Found them...

 

There's really no source for discontinued GC07Cs. They're extremely hard to come by, especially just one wheel. Might sound stupid, but have you thought about just throwing a 4mm spacer behind the one +48 wheel? That would make it sit even with the others.

 

I don't think one should ever use a spacer on one wheel.... it won't be the same. May be dangerous.

 

Yes, I thought about that but after looking at the lug holes it's going to affect the structure of the wheel. I can safely shave about 1-2mm.


There's nothing wrong with running 1 spacer, it wouldn't be dangerous at all. I mean, what would be the difference between 1 spacer or two. However, you can't run anything above a 3mm spacer on an s2000 because it won't catch the hub to be hubcentric and there won't be enough turns on the lug nuts to be safe if using 4mm or 5mm spacers, unless using extended lug studs.

I've found two pairs and 1 spare already. Thanks guys...

 

Good stuff

 

it might be minimal, but the weights on each side would be different/rotation inertia would be slightly different... That's the difference between one or two spacers. With two you will have the same weight on each side.

 

The spacer is on the center of the wheel, that's where the rotational inertia is concentrated, a 3mm aluminum spacer weighs 5-6grams so it won't be much of a difference. The wheel with the lower offsets would have more material on the pad (i.e weigh slightly more), by adding a spacer on the wheel with the higher offset you're balancing the weights on each side. I can just weigh each wheel and calculate the weight of the one with the spacer to match the weights for both sides.