Acheson Creations has some cool George Pal's 'War of the Worlds' inspired Martians that they call Kabasu. They seem to have been originally commissioned by Ed Teixeira for his '5150' sci-fi combat game.

They also have some armed centipede aliens called the Wormric. Both are reasonably priced.

Denizen Miniatures has a pretty complete line of some 25mm armored military aliens called the Ventaurans that look pretty good. They also have the K'hiff (the jackal headed aliens in monk's robes who played the villains in C J Cheryyh's Chanur novels). They will be a little small next to 28-32mm figs, but then they are aliens.


Both can be seen in Denizen's Hot Link discouraging gallery.
http://www.denizenminiatures.co.uk/25mm_new/sf_gallery.htmKhurasan Miniatures has the Garn who are 28mm tyrannosaurus-headed lizard men with weapons and armor.

He also has some vinegaroon like aliens called the Arachnians.
