Where to find rigs ready for Unreal Engine?

What are some good places to find Maya rigs that are ready to import into Unreal Engine?

I’ve been using highend3d to find rigs before but all the ones I’ve tried have some aspects that don’t translate into Unreal (constraints directly onto groups or assets instead of using joints, etc). I looked through the Character section of the Unreal Engine Marketplace but almost all of them already have animation on them, and I can’t figure out a way to see if they include a Maya file or just uassets.

They definitely don’t have to be free, though that’s obviously a plus. This is all for personal use and completely non-commercial.