The bases are different to a HW Mark. A lot lighter, with rounder base.
Peter Uptons sight will have info on what teams were available.
They are as cheap as chips on Ebay, but by the time you add on all the postage costs on each team, you would probably be better off buying Santiago's or Topspin.
Maybe just stick an extra washer in the base of a Zombie if you want them to play heavier. Easy to pull apart.
Hope that helps.