Rear seat parts needed

Hello forum members

I am new on this forum
I live in France, happy owner of a Lada Niva 2011
Car runs great

I have a rear seat problem : the previous owner had the back seat taken off. When I got the car, I got the rear seat cushion and the rear seat back, but unfortunately rear seat back brackets are missing, as per the list below


+ 21214-6820066-00
+ 21214-6820067-00
https://nivamart.ru/imgs/21214-6824085_84/21214-6824085_84_1.jpg
https://niva-urban.ru/m120-сиденье-заднее-lada-4x4-urban/

+ 11180-6824090-00 X2
https://autopiter.ru/DetalPhoto/P3006/1118682409000.jpg

+ 21214-6820210
Especially, the floor attachement is missing, it is not listed as a separated part from rear seat
https://i-a.d-cd.net/89ba9eds-1920.jpg


Would anyone on the forum know where I can find a seller for these parts, that would be willing to ship to France?
And does anyone here has a precise picture or drawing with dimensions for the floor bracket, so I can weld them myself if I can't source them?

Thank you so much for your help
Jean-Baptiste