There is someone on Bartertown who has some Khan's Guards in a Warzone lot, along with a some Fury Elite. Not sure of his asking price, but that would be a start.
The Crescentians are OK, but suffer from lack of support weapons. However, Lamented are a nice way to get a whole lot of LMG's into action.
If you put them in the right terrain, I suspect they could do well.