http://fs1.eps.gov/EPSData/ODA/Synopses/27191/H92222-05-R-0017/Attch01JCPspec080905.doc
I kinda think Glock is out of it due to the "commercially available, NDI" caveat combined with the "with and without external safety" requirement.
In fact, the "with and without external safety" requirement is a real bugger. I can only think of a few .45ACP pistols that are currently commercially available both with and without external safeties.
Off the top of my head I come up with:
H&K USP
Ruger P97
Ruger takedown pins are captive--you can YANK them out, but they have a groove and a retaining spring to prevent them from coming all the way out of the firearm under normal use.
As nearly as I can tell a mag safety will disqualify a pistol so the Ruger P345 is out. Sweet irony there...
CZ offerings don't have the no external safety option available.
USP takedown pins are not captive but that's not a shall, it's a should.
Cougar isn't listed on the Beretta website--I was checking to see if they have a rail. Are they out of production? With a rail, I think they would qualify if they're still around.