Fresh from fabrication, plating and then powdercoating, I have a pair of re-manufactured rear brake shields for the 92+ turbo models which use 297mm rear discs and accompanying twin piston calipers. These use solid original cores and then metal fabrication wizardry of an extremely high standard to remake the dust shields. Advertised here first for a few weeks for £250 for the pair, then onto eBay they will go. Purchase/partial refund for your old cores is possible depending on condition.
Fitment involves full strip down of the rear handbrake mechanism and removal of the stub axles - so basically something you would tackle while doing a full rear end refurb, along with replacing wheel bearings, handbrake shoes etc.
Andy