One thing puzzles me a little: if these black and white and color aerial reconnaissance films are so great, how come no one respooled and offered them to the unsuspecting public before? Think of the decades of creative photography that have been lost due to the unavailability of these films.
They have. This is not a new concept by any means.
Rollei has been doing it for years, they respool Agfa Aviphot. Astrum/Svema respools Tasma or agfa. Silberra film is almost certainly aero film, if not from Kodak, then from Tasma or Agfa. Probably the most widely known example is Santacolor. Both Rae 1000 and Color 100 are respooled areal surveillance stocks. There are many other places that do this, including me, who is offering surplus Aviphot 200 in MF and sheets on an extremely small scale.
People have been buying surplus or fresh areal film for many years, and packaging it in-house or with Shanghai or Foma. This business model is well explored, and it works well, so folks are happy to sell the stuff. And people are willing to buy it, because even though it might be cheaper to find surplus bulk film online, people don’t want to spend time in the dark making and packing film, they just want to shoot it.