Screwstringer parts needed

[BSimon999@AOL.COM]

A customer of mine has an 1890's Mason and Hamlin screwstringer upright in 
which a number of the stringing/tuning screw devices are missing.

Does anyone out there have any, or enough, old stringing thingees to supply 
perhaps a dozen, with cone washers(?) and nuts? The parts required alternate, 
for fore and aft orientation, and are primarily for the treble end. (I don't 
know if all these parts were of the same length, or whether they varied in 
length depending on their position along the plate in the piano.

Thanks, 

Bill Simon
Phoenix