Uranium is also much easier to trasport than gas thanks to the ridiculously high energy density of uranium. Reactor grade uranium has an energy density of about 3,500,000 MJ/kg in a light water reactor, whereas natural gas is about 55 MJ/kg - so uranium is about 64,000 times more energy dense on a per kilo basis. You don't need pipelines or fancy LNG terminals, either - it's pretty easy to transport in relatively unexciting bulk containers.

So, once the security concerns are addressed, you can buy uranium from any country willing to sell it to you and ship it. The number two and number three producers of uranium worldwide are Canada and Australia, both of which France is very friendly with (a submarine kerfuffle with the latter notwithstanding).