Here are some more
https://www.ebay-kleinanzeigen.de/s-anzeige/golf-2-16v-g60-syncro-rallye-bremsanlage-bremssattelhalter/968549943-223-9159
Translation from advert
Offer here a set (2 pieces) of freshly overhauled brake caliper holder for the Syncro rear axle for sale.
Original VW part, already dropped without replacement.
They were blasted and primed with 2k epoxy. Then painted with high-quality brake caliper lacquer.
I also have the right calipers
Just email if interested. Shipping is possible.