does anyone have good sources for alternative weapons? I'm customizing some squads, and maybe my search terms suck... but I'm having difficulty finding suitable looking weapons for my minis. Specifically looking for a sniper rifle that looks similar to Nova's from starcraft and a DL44 like blaster pistol.

Try searching Google for "28mm weapon bits". There should be a ton of crap to look at, should be able to find everything from katanas to gatling laser canons. 28mm might be a bit on the small side as legion is 32mm but depending on what it is it'll probably be close enough.

Mad Robot Minis