FWIW Bob Howard out at
http://www.stjamesbaytoolco.com/
Has all kinds of replacement Stanley parts. Some NOS others me makes. The
parts he makes are all patterned off the original. So your Stanley still
looks like a Stanley.
Spurs, lever caps, 45/55, 289, 444 etc. parts you name it he likely has it.
Usual disclaimer no affiliation just a satisfied customer.