Well when looking at pictures of 'white' the tyres looked like 048's, so I'm sorry to hear that you got screwed in that respect.
I had subconsciously wondered why you'd gone to Supersports for 'blue'..now I know.
My toy car is somewhat more basic than yours, a Seven style kit car that runs on 048's but given these come in just over 500 kilos, and lots of the kit car fraternity run these style tyres, I was just concerned that the insurance will be invalid, it sounds like it will be. Bugger.
I don't think I'd ever run these things on my Golf though anyway, as that's more of an all weather thing for me.