Minichamps did all 4 Steinmetz Opels from Spa 1970 (numbers 8,9,10 & 11) in both 1:43 and 1:18) so there should be a few around.

I hope Oxford's 1:43 range continue under Hornby - their choice of models over last few years has been far more interesting and quirky than Vanguards fairly predictable range of safe and unadventurous choices. It's as if Corgi only release models approved by focus group research, while Oxford choose things they're enthusiastic about.