NFA 10-22's
They are out there, and yes, if it has an integral suppressor, it DOES require 2 transfers. (unless it's JUST a suppressed rifle, and not FA) They are out there as I said, but expect to pay $4K (GREAT PRICE) to over $6K.. If it's one-owner or NIB, you could spend even MORE

It's not a cheap hobby! Check out the NFA ads at
www.subguns.com There are other sites out there that may have the rare gem you seek. I'm still waiting on "21" to roll around in a couple months, then ATFE is going to get a large envelope in the mail from me... Not for transfers or Form 1's, but rather for a C-2 SOT, and T-7 FFL....
Hope this helps
Sincerely,
GAU-2