Use custom font for numbers in linguex examples

I have a custom font specifically for numbered lists — it renders the numbers in an enumeration in a nicer way than the standard main font. Once I’ve loaded the font into a new font family which I call numfont (using fontspec), I can use it in enumeration like so:

begin{enumerate}
    item[{numfont 1}] his
    item[{numfont 2}] her
end{enumerate}

Is there a way to do something similar for the numbers in a linguex example? I would prefer something similar in style to how I did it above, rather than changing the font for the numbers universally. The font I have only draws numbers (not alphabets), so I would prefer to use it only in that case.

documentclass{article}
usepackage{linguex}
renewcommand{ExLBr}{(sffamily} % using sffamily as an example
renewcommand{ExRBr}{normalfont)}
begin{document}

ex. This is an example

ex.
a. This is a subexample.
b. This is 

end{document}

ex.[{numfont 1}] Here's your fancy numbering font.