You will have a great selection of shocks then....
I am not so sure. Any mfg that still makes shocks for old twin shock bikes makes both clevis end and eyelet shocks. Plenty of bikes use clevis end shocks (DOHC hondas, GS series Suzukis, etc).
Clevis end shocks are still relativley easy to get a hold of, and there are still twin shock bikes made today that use clevis ended shocks. If you check the yahoo japan auctions you will see a lot of new cheap shocks with clevis ends.
Works, Hagon, Ikon, Boge, Ohlins all make clevis ended shocks just to name a few.