B&H stocks 50 foot 70mm double perforated HP5, I bought a roll. Makes zero sense unless you want to re-create the (FAKED) moon landing
Or, you need to load 70mm backs. I am currently looking for a couple.
It's especially fun trying to juggle it onto an enormous Nikor reel.
Or, you cobble together a Kodacraft apron and a lenrth of PVC pipe. Nikkor reels hate me!
Neil Armstrong used a disposable camera (Hasselblad), Neil Armstrong didn't have to process his own film!
Of course the real clue to the (FAKE) moon pictures was it was shot inside on TUNGSTEN Ektachrome