If I was you I'd just order or find another 9J and stick with the proper factory staggered setup on your car. If it was any old blah E34 Touring sure, go for 8J's all the way around. But you don't have any old blah E34 Touring. You've got one that came with M-Systems on it from the factory. And it was staggered from the factory.
I'd almost want to order a new one and have it refurbed along with the others so that the paint would match. Yeah, I know refurbing a brand new wheel seems kinda dumb. But it'd be the only way you're going to get 4 color matched wheels.
Cosmos Black/Black 1995 540iA M-Sport
BMW Individual Exclusive Edition, 1 of 65 total, 9/25/95 Build