There's no original holograms for sale other than perhaps a few in collector's hands. These original holograms have been popping up on E-bay lately, at a rate of a couple per year or so. Usually someone on RGP posts that one's up for auction, and we all watch to see how high it will go. I believe the last 2 or 3 holograms I've seen on E-bay sold somewhere in the high $600 to $900+ range. That's some serious coin for a hologram.
There seems to be a big demand for these holograms, and simply not enough out there for people who want to have a perfect CFTBL.
I don't know of a decent option to the Pinball Heaven hologram, unless someone can do something awesome with a small LCD panel placed below the playfield that would produce a cool image of the Creature when required.
Good luck on your search.