Turning off DeclareSourceMap for bibliography

I am wondering if it is possible to turn off the effects of DeclareSourceMap part way through a tex document. Any tips on how to do this?

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Here is some more information on the situation I am in. I am trying to get a unique citation style to work, which is based around biblatex:

usepackage[backend=biber,bibstyle=nature,citestyle=authoryear,maxcitenames=2,maxbibnames=99,uniquelist=false,sorting=ydnt]{biblatex}

I use the following to add the journal name to the authoryear cite style:

% add journal name to inline citation
renewbibmacro*{cite}{%
  iffieldundef{shorthand}
    {ifthenelse{ifnameundef{labelname}ORiffieldundef{labelyear}}
       {usebibmacro{cite:label}%
        setunit{printdelim{nonameyeardelim}}}
       {printnames{labelname}%
        setunit{printdelim{nameyeardelim}}}%
     setunit{addcommaspace}%
     usebibmacro{journal}
     setunit{addcommaspace}%
     usebibmacro{cite:labeldate+extradate}}%
    {usebibmacro{cite:shorthand}}}

Finally, I use DeclareSourceMap to shorted journal titles in the text. The result is as desired, which is references showing up as [Doe RSI 2006] when cited in the text.

HOWEVER, I would like to turn off the shortening of journal titles when I actually print the bibliography at the end of the document using printbibliography. At the moment, my bibliography looks like:

Doe, A. B. & Smith, J. S. A journal article with a cool title. RSI (2006).

I would like the bibliography to look like this:

Doe, A. B. & Smith, J. S. A journal article with a cool title. Review of Scientific Instruments (2006).

But I need to preserve the citation formatting in the text as explained above.

Is there a way to turn off the effects of DeclareSourceMap directly before the printbibliography call?

Thanks for your help.

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A MWE is included below:

documentclass{article}

usepackage[backend=biber,bibstyle=nature,citestyle=authoryear,maxcitenames=2,maxbibnames=99,uniquelist=false,sorting=ydnt]{biblatex}

usepackage{filecontents}
begin{filecontents}{mybibfile.bib}
    @article{file,
    author = {Doe, A. B. and Smith, J. S. and Author, G. B.},
    title = {A journal article with a cool title},
    journal = {Review of Scientific Instruments},
    year = {2006}
    }
end{filecontents}

addbibresource{mybibfile.bib}

% add journal name to inline citation
renewbibmacro*{cite}{%
  iffieldundef{shorthand}
    {ifthenelse{ifnameundef{labelname}ORiffieldundef{labelyear}}
      {usebibmacro{cite:label}%
        setunit{printdelim{nonameyeardelim}}}
      {printnames{labelname}%
        setunit{printdelim{nameyeardelim}}}%
     setunit{addcommaspace}%
     usebibmacro{journal}
     setunit{addcommaspace}%
     usebibmacro{cite:labeldate+extradate}}%
    {usebibmacro{cite:shorthand}}}

% abbreviate journal names
DeclareSourcemap{
 maps[datatype=bibtex,overwrite=true]{
  map{
    step[fieldsource=journal,
          match=regexp{ReviewsofsScientificsInstruments},
          replace={RSI}]
  }
 }
}

begin{document}

This works as intended: parencite{file}

This does not work as intended: 
printbibliography
end{document}

renewbibmacro*{cite}{%
  iffieldundef{shorthand}
    {ifthenelse{ifnameundef{labelname}ORiffieldundef{labelyear}}
      {usebibmacro{cite:label}%
        setunit{printdelim{nonameyeardelim}}}
      {printnames{labelname}%
        setunit{printdelim{nameyeardelim}}}%
     setunit{addcommaspace}%
     printfield{shortjournal} % changed line
     setunit{addcommaspace}%
     usebibmacro{cite:labeldate+extradate}}%
    {usebibmacro{cite:shorthand}}}

DeclareSourcemap{
 maps[datatype=bibtex,overwrite=true]{
  map{
    step[fieldsource=journal,
          match=regexp{ReviewsofsScientificsInstruments},
          fieldset=shortjournal,
          fieldvalue={RSI}]
  }
 }
}