Nice find, and replacing handlebar/stem/levers shouldn't be a problem. FWIW, Simplex did make a forged rear dropout that did not have a derailleur hanger--I have one like that on a Jeunet, that came with a Simplex derailleur, and I switched to a Huret. So while yes that one was probably cut down, you can still feel authentic. NICE saddle, aren't those quite expensive all by themselves? I have a similar Gitane from a different model year--the one with the honeycomb huret dropouts--but it is otherwise very similar (fishmouth treatment at dropouts) and rides very nice....