Centennial "1960" Shoulder Stock Screws

[Malachi Leviticus Blue]

I have a Belgian made Centennial "1960" that is cut for a shoulder stock. The problem is it is missing the shoulder stock screws. I just have a hole on each side of the frame where they presumably used to be. (this is how she came to me) I'd like to replace the screws, but don't know where to find any or what thread they even are. I don't really like having open holes there.
I removed one from an Italian 1860 copy (either an Uberti or Pietta, I can't recall which) a while ago and it did NOT fit the Belgian revolver.

Anyone here have any helpful info their willing to share?

 

[elhombreconnonombre]

I know that Dixie had the "4th" screw in their catalog at one time that presumably fit the Piettas, but I would assume it was metric, so I have no idea what it would have been for one of the Belgian Centaurs, but I am sure someone will drop by and let us both know.

 

[Crawdad1]

These guys may have it,

http://www.1960nma.org

Or this gentleman,

David M. Evans
FROCS # 130 Footsore
29609 Bock St.
Garden City, MI 48135-2322