What about the Sig 1911-22? There is one on GB for $412 and a few days to go.
From quick review it sounds like they are 35oz (so maybe decent materials???) and made in Germany. I almost bought the threaded GSG 1911 back in the day, but shied away from the "pot metal" reviews I was reading about. Ended up with a M&P22Compact as a host.