Listers:
Velo Orange has French thread bottom brackets in stock. The same quality and features as their English sealed bottom brackets, but with the hard to find 35x1 R/R threading.
more here:
http://velo-orange.blogspot.com/
They will fit any french threaded Motobecane, Peugeot, Gitane and other French marques made before the early 80's.
Velo Orange has them priced for under $50.
Full disclosure: I am the General Manager of VO Imports, the dealer/ distributor side of Velo Orange. Shops can contact me directly for a dealer application and wholesale pricing on the BB's and other Velo Orange goods.
Tom Martin
VO Imports
1817 George ave
Annapolis MD 21401
e: tom@voimports.com
p: 443-949-9923
f: 443-926-0095
w: http://www.voimports.com
w: http://www.velo-orange.com
t: twitter.com/velo_orange