Sash Pins

Sash pins are used to fasten the mortise and tenon joints of window sash.  Sash pins are made from 11 ga. (0.120" dia.) steel wire nails, with a standard diamond point and a head similar to, though slightly smaller than on a standard finish nail.  They used to be readily available from domestic nail manufacturers.  We are looking for a nail manufacturer, preferably in the USA, to make these sash pins for us.   The  sash pins are about 1/8" shorter than the thickness of the sash, so we need 1" long sash pins for standard 1-1/8" sash, and 1-1/4" pins for standard 1-3/8" sash.

Any information that help us locate a source for these sash pins would be greatly appreciated!