I went to a major sale at a local hobby shop recently, and they had some Confrontation pre-painted miniatures marked at half price. I'm not a player of any Rackham game, but some of the miniatures interested me. There was a box of "Scorpion Phemera Omega" miniatures for $15, so I bought those.
There are 8 in the box, and these creatures remind me of hormagaunts from Warhammer 40k, but in a size appropriate for 1/72 miniatures. For pre-paints these are not bad, although they have rather large bases that I may have to replace.
As you can see in this comparison, they are a decent size to go with modern 1/72 miniatures.
Another angle shows some of their detail. You can easily imagine a horde of these attacking.
I'll probably look around for more sales to buy more of these creatures. It seems appropriate for them to come in a large group.
Also, inspired by Eric at 1/72 Multiverse, I bought some reduced-price AT-43 Red Blok battlesuits from the War Store. These are nice miniatures, especially at their price of $13US for a box of 3.
This shot shows the type with a machine gun and a flame thrower next to a 1/72 scale VAB. These are meant to be powered armour in 28 mm scale, but they seem to fit nicely as battlesuits or mini-mechs in 1/72.
Another shot with one next to a Sagaie.
Two of them next to a Caesar 1/72 scale nun. They are suitably imposing compared to 1/72 scale humans, and should put a good sci-fi element into games when mixed with moderns. I may repaint these to a colour scheme more appropriate to my setting.