Do any of the sponsors (or indeed anyone on the forum) sell tyres for us mere mortals with "normal" cars?

I'm going to be in the market soon for a couple of Continental Sport Contact 3's 235/40/18 Y.

Thanks  Current: I can't say...Oh the Shame!
Gone: 2003 Audi S4 - 340BHP of Fun
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Gone: Audi A4 2.5 TDi Quattro 180bhp
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Gone: Subaru Imprezza Turbo (rubbish)