Originally Posted by
Paul S.
Mate, I would suggest a firm like MARSTAR in Canada or even SARCO INC in the US for Inglis grip screws but I know from doing a quick on-line check that neither has them in stock. Although there may be some value in contacting them directly as they may have an odd one lying about.
Other than that, there is a very remote possibility that a fellow collector or someone with access to bins full of bits and pieces from or for older, Commonwealth weapons, may be able to find one for you.
Also, it just came to mind that there is a firm in the US Pacific Northwest that makes otherwise unobtainable parts for antique or vintage firearms. I'll have to have a look for the details.
Mind you, I've never actually confirmed by checking what the thread pitch or the diameter is for the Inglis or FN grip screws. Hmmm....