I haven't seen a loose AMD-65 barrel in some time. Good luck in your quest.
I think you could turn down a romy barrel.. If you need it done, as a fellow Mainer I can recommend my very good friend as he is a machinist.
Definately not an easy one to find. I had even emailed several vendors asking, NONE of them replied....
I already have a Romy installed. I think I'll stick with that.