Glad you finally decided to join in on the conversation. Better late than never.
Revolvers are still a foreign concept for me (I intend to get into them within the next year), but I found a few candidates for your AMT Backup.
This one seems to have good reviews (generally), a retention strap, and is made of leather* (perfect for holding an all-metal gun, marking you as a man of good taste ):
Brown leather* version:
If you'd rather have polymers (yuck!):
*IMPORTANT NOTE: From my experience, people on Amazon (and other non-specialized, mass-market sites) generally don't understand leather holsters. Don't spray the holster with leather softeners!
A tight fit to unholster is a GOOD thing as it provides extra security by holding your sidearm. Use and wear will loosen up the fit until it becomes perfect (only takes about 6 months, tops).
One tip which may help: hot wax your holster with the gun in a bag and in place? It will result in a Kydex-like click, molding, and water resistance. Here is a thread about DIY gear in which I described the wax process I used: http://forum.opencarry.org/forums/sh...42#post2033942