I might have a pair of 17x8.5+30's for sale in the near future. We'll see. The 8.5's are sweet up front because you can run a 225 for traction and still get a nice sidewall profile. They look awesome on an S13 with a 15mm spacer, too.
Just mocked up the 2003 Altima rear rotors with Z31 brackets. It's hilarious how well it works. If my hoses come in, I'll get it going this weekend.
Longfellow, I have that spare set of Z31 brackets for you. But, they're painted silver.