I managed to track down the last remaining above mentioned card.
Unfortunately it's MIA.
Little backstory on the card. My contact's english isn't very good, so if parts sound weird, that's why, I had trouble figuring out exactly what I meant and had to ask to clarify a number of times.
Sapphire made two cards for CEBIT, both were non functional. According to my contact this was just a " for fun project". At one point Sapphire did want to make a Dual 9800 card but (the following is not 100% clear to me) Either ATi restricted it via not providing a multiGPU driver, or just didn't support Sapphire in it. Also it didn't make sense for Sapphire to put a Dual 9800 to market with the X800 being so close.
Anyway, Sapphire showed them behind glass so people would not spot it being a fake. It was basically two parts of PCB fused together. The second GPU has no traces to the first. So the two boards were not functioning.
After Cebit, Sapphire wanted to throw them away. My contact asked if he could have one of them, and Sapphire agreed.
After a long time my contact gave his private collection to several people. He couldn't remember who he gave this card to, but eventually tracked it down. Unfortunately his friend has been searching for it for a long time, he thought he gave it away to neighbor kids to play with (since it wasn't working anyway), he asked if they knew were it was, and they didn't recall getting the card from him.
So that's where the search ends I'm afraid. If the card is still around, it's most likely somewhere in Russia.
It's very likely the second card got thrown away after Cebit by Sapphire.