Hey guys, I found a cool website that has some nice bits to use in conjunction with your Imperial Guard regiments. Its called Anvil Industries and they have a bunch of lovely, well, bits. Seem pretty cheap too, in some cases. It all appears to be UK made too.
https://www.anvilindustry.co.uk/regimentsSome of these are really well sculpted, especially the heads! Get a couple of female Ushanka heads, Male Ushanka Heads, throw them on some cadian bodies and you have Cain's Valhallan 597th in temperate or warm weather gear! They also sell torsos, legs, arms, etc, and full models too if you want to go the whole way with them. Why you can make all sorts of IG armies with these bits.
There are some cool rat models, some with bombs strapped to them, which would be great for a skaven army for bases and such and some nice bases in general as well. I found some nice top knots for a possible Sons of Horus 30k army. They have Space Marine and Sisters of Battle stuff too, but they really didn't impress me much. YMMV. The Special Effects bits are kind of cool, like muzzle flashes, flames, etc.