Good source for Soviet Commemorative Coins? Also, anyone collect "space" themed coins?

obversity

Can anyone recommend a good source for the following Soviet commemorative coins:
- 1979 1 Rouble 22nd Olympiad, Moscow Conquerors of Space
- 1981 1 Rouble 20 years first human space flight. Yuri Gargarin
- 1983 1 Rouble 20 years first woman in space.
- 1987 1 Rouble Tsiolkovsky
- 1991 3 Rouble 30th anniversary of first human space flight

Obviously they all fit a theme ;-) Anyone else collect space-themed coins? I imagine there probably aren't that many. Anyone know of a comprehensive list of what exists in this theme in the world?

-obv

1960NYGiants

I have collected space exploration coins + medals off and on over the years. And have a couple hundred pieces in my collection.

Keep an eye on eBay for examples. Try Dan's site Black Mountain Coins for NCLT issues.

There used to be a dealer out of the south eastern USA with a huge inventory. I'll have to look around to find his name.