For my Palette 62, I got a Befaco AC/DC. It has 4 ins and 4 outs, so 4 to PC and 4 back to modular. I like its size and functionality, but I need to say it's very noisy. I found this out the hard way and found discussions about it on the forums as well. I contacted Befaco about it but no reply yet. But if you can live with that (which I can, because the Befaco is in it only when I'm out of the house on holiday and taking only the Palette case), the Befaco is a nifty small module that's not too deep for the Palette cases.

Modular playlist on SoundCloud