"Cheap" digiback for 500 EL/M?

Hi everyone,

my dad just decided to bestow upon me his complete Hasselblad equipment from the Seventies: two 500 EL/Ms with meter prisms, 500mm tele lens with rifle stock, six other lenses, bellows, ring flash, macro slider and a ton of other paraphernalia – pretty much everything any Hasselblad fan could dream of.

But of course, there’s trouble in paradise: as a digital-only hobby shooter I understand traditional techniques such as film and dark rooms just as much as an elephant understands knitting, ergo I need a digital back for the Hasselblad. While I’m not exactly vegetating below the poverty line, a digital back will still rip quite a hole in my wallet, so now I’m looking for pointers on the cheapest option (I don’t print my photos, so 16 MB already constitutes overkill for me, and the only requirement I have is a built-in display) and where to buy it.

I found a German website listing the following third-party providers for digital backs matching the Hasselblad V series:

Jenoptik, Megavision, Phase One, Rollei, Scitex, Sienna Imaging, Sinar, Leaf, Fuji and Kodak.

Are there others? Which ones would meet my demands? I wouldn’t rule out buying used gear, by the way.

Thanks very much in advance for your kind help!

Hans