Yes I already do use the Fujimoto for 20x12 images, but a lot of my images aren't panoramics.
The Jobo drum idea is interesting but I somtimes have needed to have 50x50 inch prints done. My current darkroom is way to small to even project that size!
I really want to get away from any hint of digital processes, as that is the one of the key elements of my work, it seems a bit odd to go to all the trouble of making an optical image just to have a lab mess it up by scanning the neg at the end!
I'll check out those London labs, cheers!
(there must be some nearer me than that though I hope!)