Last I looked, Film for Classics was processing, but not selling 122, 124, and similar films wider than 70 mm. They may still be able to provide precut reloads for 116/616, since that's just unperforated 70 mm, but 122 and 124 are 90 mm wide, actually a bit larger than 9x12 cm sheet film (which is about 88 mm to allow for the film sheath and fit where a 90 mm glass plate did). Spools are easily fabricated from hobby brass sheet and dowel stock, of course; you can obtain aerographic film and cut it to width with a slitter (the 9 1/2" size won't quite produce three 90 mm strips, sadly), but backing paper is a real killer; the best method I've seen for 116/616 is to make it up from two strips of 120, but even that may not work for 122 and 124 because of the very long frame spacing -- almost 4 1/2 inches in 124 and just over 5 1/2 inches in 122.
J&C Photo seemingly has a source of usable backing, and a semi-tame coating and cutting capability for their Pro 100 in 120 -- I wonder if they might be convinced to produce a run of 116/616 and 122 or 124 reloads (film and backing to fit customer spools) or complete film (with fabricated spools) in this stock. The question might just be, how big would the order have to be to get a custom cut.
It's nice film for the price...