They are far from done, but I'm using the plastic marauder horses. I only used the heads that had head gear, blended the head gear into the head, shaved away the mane, ears, and tail, then attached the tail of a lizardman(cut it off the lizardman at an angle so you go a little up the back). I also plan to put some crests or spines on the necks, maybe from plastic khorne demons. Still alot of GS work to do, but they are really starting to look the part.
It's part of a combined Mutie/Scavvie/mutant horde I'm working on.