balefire

odd question.
does anyone know of any matching 17 and 18 in wheels for porsche?
i ask because ideally id like to run 17x8 wheels in the front and 18x10 wheels in the back for scca street autox purposes.
the lighter the better.
i don't think oz alleggerita wheels are offered in 17in for porsche fitment.
i don't think volk te37 are offered in in 17in for porsche fitment.
are there any OEM wheels that match?
thanks!