If I read one of your earlier posts correctly - a copper-plated frame like you mentioned sounds very cool and I once actually gave a thought about doing that myself to a rawed SS/FG frame I had.
But...how many of your "local friends are excited to see my progress as I've been dreaming and talking about this build for the last 3 years" are real and/or knowledgeable vintage bike buffs? Did you ever ask in any Pug interwebz or FB groups?
I don't get french bikes myself, but a PX-10 is not just any run-of-the-mill old bike. For your dream build, did you really have to have a very sought-after bike that many others, especially vintage francophiles, would have given their left nut to have a shot at restoring, no matter where it was discovered and whatever its condition? And now there is one less of them...
OK, so sorry for letting my retro-grouch out on you, sorry to preach, and its too late now anyway...so good luck and enjoy