OK, this is 935 rear suspension plate version 3.1.
Unfortunately, it's not so cheap anymore but still substantially cheaper than alternatives available on the market.
We settled with hi-strength 12.9 bolts (with smooth surfaces where shearing loads are applied), sandwich construction with twin plates, offset-welded threaded pipes (no need to bend the plate), gold-plating for better corrosion resistance, locking nut for uniball rod, heavy-duty all-metal SKF uniballs and big insert where torsion-bar bushing once was. (This way,most of the load is transferred to bushing itself and not bolts holding the plates, just like OEM solution except there is a uniball instead of rubber bushing.
Many modifications were result of input from people on forum, thanx!