That was me asking about them, I never really found what I was looking for. I did find a few for other aircraft that may be cut to fit. That recessed armrest you show is EXACTLY what I'm looking for. The existing arm rest sticks into your side and does absolutely no good. Not sure why the "interior designer" would place it there.
Here is the thread "ELBOW ROOM":
http://www.337skymaster.com/messages...ead.php?t=5035
This would be a great mod, and the pic shows it in a P-model like mine, which is encouraging!