I have one model that uses a Termi body with
PA arms. They do look a bit stubby but
IMO not bad. I'll try to get a picture of it up tonight.
The trick is to use a termi shoulder pad and fill it with green stuff the fit the arm in it towards the bottom of the pad. It looks like I do have a picture of a termi with a possessed arm that i'll post to give you a basic idea.