Here’s some sources. I just got .45cal ACP 165gr HP from Co-Bon/Blazer (usually get 230gr). Wilson Combat has ammo avail, too.
http://www.ableammo.com/
http://www.thepoliceloophole.com/
http://www.sgammo.com/catalog
http://www.cheaperthandirt.com/
http://www.midwayusa.com/
http://www.theboxotruth.com/#13519954922231&ifh=44
http://palmettostatearmory.com/index.php/
http://www.shopalexanderarms.com/.50_Beowulf-Ammunition.html
http://www.aimsurplus.com/
http://shop.ammocanmagnets.com/50-cal-size-Black-Font_c11.htm
http://www.doubletapammo.com/php/catalog/index.php
http://www.gunbot.net/
http://www.impactguns.com/nemo-omen-300-win-match-rifle-omen-match.aspx
http://www.kygunco.com/
http://www.luckygunner.com/
http://www.aimsurplus.com/product.aspx?item=XCanM2A1&name=New+Mil.+Spec.+M2A1+.50cal+Ammo+Cans&groupid=614
http://www.sgammo.com/
http://www.hksspeedloaders.com/Index.html
http://wilsoncombat.com/new/default.asp
http://www.ammoman.com/
http://www.corbon.com/
http://www.federalpremium.com/default.aspx
http://www.natchezss.com/
http://www.brassfetcher.com/index_files/Shotguns.htm
Nice list. I checked then all. But not a single round of 9mm for sale, unless you count a few rounds of boutique 9mm for sale on Wilson for a buck a round.