Frame line preview lever - Replacement screw

[ChuckBindy]

I picked up my Hexar RF today and noticed that the frame line preview lever was loose. It was loose because the screw is missing. Any ideas for a replacement ? I was thinking of trying out an eyeglass screw with a little matte black paint on the head.

 

[Al Kaplan]

Try and find one that fits and don't worry about the color. Gold might look nice. It won't stand out any more than a red dot would!