Empress' Modern Australian/ New Zealanders have them too (including variants).
Depends on what you want them for though. A few models in Foundry's Street Violence range also have them, but they're more gangster types than soldiers.
Hasslefree has loose ones, but they were pulled from sale (actually I'm not sure if they were ever released - Kev White complained that other companies were stealing them for their own casts - thus why you don't find many high quality loose weapons on the market ...at least according to him. He has a big bag of loose guns he keeps for his own models sitting about FYI ...which he slaps your hand away from when you try and nick a few
). You may come across them on Ebay, but that's doubtful.