The .45 Auto "requirement" greatly narrows the field. Off the top of my head...
3rd gen S&W
P250
P220 DAK
USP LEM/DAO
Some kind of Glock with a NY1/- connector setup (it's kinda DAO-ish)
Kahr makes a couple
Heck, I'd probably include a Model 25 or 625.
Frankly, nothing else really comes to mind.