I've seen pots at my local garden centre with the orchids, together
with bags of coconut husk as a growing medium.
I believe you can get all such items mail order from

Ray Creek Orchids
Luddington
Tel. 01724 798445

Unfortunately no website, I had his mail order list a few years ago &
there were stacks of unusual orchids + normal stuff too.

Search for 'ray creek orchids' & you'll find plenty of references.

DD