what shock absorbers with alloy A arms

[Wally]

Yeah, had the same encounter with the shocks lower mounting hole as well! Bummer!
Since the Porsche bolt that screwsinto the Alu arm was 14 mm and my Bilstein shock was (normal beetle size) 12 mm, I drilled the steel tube which is enbedded in a rubber, in the bilstein shock to 14 mm. Gets a bit thin, but it doesn't seem to matter, because its still fine and I have already done a lot of crazy things with the car...
I'am not sure if I want to advise you my way, but it works for me anyhow.
Walter