Plastic Mason action parts

[Dave Doremus]

I just looked at a Mason & Hamlin console with plastic jacks, hammer,
damper and wippen flanges and backchecks (!). Have any of you with more
extensive upright experience than I found acceptable replacement parts and,
if so,  who's got 'em?
This belongs to a great old boy (80+) who lost his wife last year and would
like to hand her piano on to the musical grandchild. Money is no object,
quality is. All questions of intrinsic value aside, Id really like to see
this thing playing again, it would mean a lot to the owner and aside from
the crumbling plastic is really in quite good condition. Any suggestions
for a good source of well made parts would be a help. Thanks,