I restored an original series Ampeg SVT-810 Square Back Bass Speaker Cabinet from the 1960's or 1970's a couple of years ago. It came out great!
I saved the original parts:
a) Casters
b) Caster Inserts
c) Strap Handles x 3
d) Speaker Mounting Screws
e) Other miscellaneous hardware
I was going to throw this stuff away but one of my band mates suggested I offer it to anyone wanting to bring a similar Ampeg cabinet back to life in its original condition without using new replacement parts.
I put the price at $100.00 but let me know if you're interested and we can talk.