My guess is that they just aren't shipping any to the US anymore. Could always ring up Felder and see if they'd sell you one for an A3-31.
Regarding cranking, I have a Hammer A3-41. My simple and cheap solution may not be the sexiest, but it took 20 minutes and $12, including paint.
https://www.youtube.com/watch?v=veJPpksmW8w