I've recently branched out a bit into other malaxids: Malaxis, Crepidium, Dienia, Liparis, and co. They seem to like me, so I like them. MUCH more cooperative than Oberonia.
Not easy to find, though. I got all from Andys and Ben/Ruey/aaorchids, and a few more from Pharo. Saw a couple at J&L that I already have.