Yes you definitely have your hands full with this one. As far as I remember, Stronglight cranks only used their own bb's, cups ,etc. Most of the French components are highly proprietary. If you cannot find it on line, try to find a bike shop that has been in business since the 1970's. They might have old stock of some of this stuff. Otherwise, and please don't take this wrongly, sometimes at the dump people are throwing out old bikes from the 1970's era and you can harvest some old parts. There used to be a bike importer in Virginia called Mel Pinto Imports that specialized in European bikes and parts. I am not sure if it exists anymore, but worth looking up. Otherwise, perhaps a bike shop can check Sutherland's handbook and see if an old TA french BB may fit, otherwise the Phil. Good luck. Unfortunately French bikes can be maddening to find parts for because the stem and bars are .2 mm smaller than the universal norm, french thread headset, bb, sometimes even the rear hub and freewheel. Enough to drive you nuts !