You can still get Gitane bikes/frames - only in Europe and Australia. Peugeot I'm not so sure of. There are a few on the GitaneUSA message forums that have ordered frames and built up modern Gitane bikes.
It would be nice to see one of those makes in the peloton again. My '84 PSV made me prefer French bikes over many others. Even today I tend to look for Peugeot or Gitane to buy before other makes.