Can you guys elaborate on why I should get a crankset and then choose a BB? Living on an island doesn't really give me much of a selection of parts and the 102mm Italian thread Campy Chorus is literally the only BB here that will fit my bike. I have more cranksets to choose from here so I'm hoping one of them will fit.

Another option is to just order an Omnium with BB included but I've read they have chainline problems too. Are they adjustable?

Some more pics attached. I was told the frame is a one-off and I've never doubted that it is real. I'll try contacting the US distributor to see if they can get any more info.