What springs and shock absorbers to put on the rear (independent suspension)?
1... The most Spartan and affordable configuration: shock absorbers from a Volga (shorter than standard by 7 cm) + cut springs from UAZ Patriot, Hunter (early releases). Lower, stiffer, works better.
2... Also fit springs from Mazda MPV, Toyota Estima 30, Nissan Terrano 50 (external diameter is slightly larger, the last coil doesn't fit into the ring on the body, moreover these springs are quite soft), Chevrolet Niva + true pleasure, shock absorbers from Toyota Dyna.
3... And don't forget that it's easy to choose a replacement yourself and order on Exist/EMEX, having input data:
Dimensions of GX71 springs: inner diameter 117 mm, outer diameter 145 mm, coil thickness 14 mm, height 397 mm.