Globe Dumbbells?

A few years ago I bought a pair of 55# York dumbbells with spherical ends. Got them in a used fitness equipment store. I decided to start collecting them. So far I have a pair of 90s, 85s, 20s(not as old), and 35s. They are all York and are wicked cool. I find some on Ebay every so often but have bought all mine by hunting and never paying more than .25 per lb. I have hit a big dry spell with these.

Anyone know where I can find some? Suggestions?
I am also looking around for old York and Eleiko bumpers. Anyone else collect old shite like this?