sorry I was wrong about the front wheel size, they are 18 X 8.5, NOT 18 X 9.5 like you were looking for, I wasn't able to test mount them this weekend due to poor weather and I was called in to work.
I got them in 06 brand new with tires and had them in storage until my car was out of the body shop, I had them on my Z32 from april to aug of 07, about 5 months. I went wide body since the offset wasn't for the Z32. Think they were ment for a Z33. Then in aug of 07 was rear ended, and they have been in my closet ever since. They weren't affected by the accident at all, I have another Z32 that I was working on rebuilding but I got impatient with the project and just got a new 370Z.
I know that they are discontinued, they are SSR GT3 RIMS
With less than 3000 miles on them BRAND NEW
front is a 245/40/zr18 93W 18x8.5 offset is +30 type C
rear is a 275/35/zr18 95W 18x10.5 offset is +43 Type F
both ment for a 114.3/5 hub
they come with KUHMO ecsta supra 712 tires
both rims and tires have less than 3000 miles on them and no curb rash at all. BRAND NEW
only thing is the front driver side tire was hitting the fender b/c of clearance issues and a little bit of tire was taken out on the outer side , just pm me your email and I can send pic's if you like