Hiya Justin!
Great to see a fellow Perthie on here...suddenly I feel less alone.
Unfortunately I don't know where the tyres were bought or even how much they cost...they came with the car when I bought it.

I'm not even sure if you can still buy them and I suspect they wouldn't be cheap given the size and all...I haven't seen them around.
They are very serious rubber for the stock rims. It's amazing though, they fit perfectly even though they look chunky. The back of the car is raised a bit from the size of the rear tyres...looks cool though...lol.
Where is the W.A MK2 Mailing list located? I will join up... 8)