I also ordered a roll of 122 last year, but didn't get it. How many was that for this thread alone? (couldn't afford 2, sorry.)
How about an ordering system with a second chance option? Order product A (in this case a 122 roll), and if that doesn't meet the minimum, only then switch to product B (perhaps the 9cm FP4+, which would be rather less expensive as a bonus).
I should point out, the film stock doesn't have to be exactly as wide as the backing paper, so the 9cm would work almost as well as the 122. I've taken apart a couple rolls of 125 (3B) size roll film to see how it's made. What they did to make this was use the actual 122 stock (I measured it), but wound it on a 103 spool, which is almost exactly 5mm wider than the 122 spool, and widened the backing paper to match the spool. This leaves you with film that's just a tiny bit narrower than its backing paper. If Kodak could make that work, then I can use the 9cm stock in 122 backing paper instead of the 91.75mm stock that didn't wind up being manufactured due to insufficient demand. I've also loaded 105mm microfiche stock in 123 spools, which are almost 15mm wider, with home-made backing paper, and made that work as well.
(though now I can't develop the stuff... no darkroom at the moment, and the largest daylight tank I have is the ancient Kodak Film Tank's malodourous celluloid apron, which only fits up to 122.)