Which ones specifically? Early on I was using Mongol models (I think I listed the manufacturer), though most of the newer stuff was sculpted on top of wire armatures,
I may be going back to play another Frostgrave campaign soon. The plan's been for my next warband to be guys wearing Dwemer armour and with animunculi (a construct warband in other words). I'd also then like to make some more Dwemer terrain and create an addon set for my caves which would be dwemer ruins.
Random arms and legs from Wargames Factory WWII and Perry stuff IIRC. Its mostly mentioned when it turns up, but the Perry and Deus Vult plastics are the major source of weapons. Wargames Factory do some Samurai and Orcs which are handy as well.
I've a pile of metals there to use for Nords for a Skyrim warband, but haven't had the urge to do anything with them yet. Dwemer seem more appealing.
Don't know if you're still going with this Elder Scrolls project, but if you ever want some Jorrvaskr Companions, Atlantis Miniatures do some fantastic werewolves.
Frostgrave's fallen by the wayside after the campaign I ran of it. I usually hang onto a system for a year and move onto something else. Now I'm back to doing my modern stuff. Whenever I pick this back up again I have a cave system to expand on (that's probably the most unique draw the setting's having for me at the moment).