Thanks.Alternator is Denso 70A. There are many on Ebay. It comes with its own small diameter pulley; do not replace it with Opel pulley. Denso smaller pulley enables higher RPM, required by this compact size alternator.
Regarding condenser, I did not keep the purchase record but it was bought on Ebay by size. I tried to stay as close as possible to the Opel radiator size. It was tight fit and I had to relocate ports. They were oriented toward the side of the condenser where there is no space in narrow GT bay. I also had to trim the condenser lip to clear brake booster.