I handled one at a local shop recently. Apparently the receiver is made by Beretta. The cost was $799. It had really pretty wood.
That's all I was able to find out.
SA told me that 300 were built w Breda (Italian) receivers, the rest are Australian (all are forged, not cast)). Barrels are Wilson blanks SA turns themselves. The other parts are older/unused GI parts that are cleaned/refinished.