Separatist boarding craft aka Pod Hunter.

[Battle Droid]

I'm really surprised that this ship hasn't be released yet, it's appeared in at least four Clone Wars episodes that I know of.

[Tycho]

I think I might buy one if they made it.

I'd buy 4 battle droids to go with it, and Wolfe, Plo Koon, Boost and Sinker to fight it.