I bought those tires from North end tires (second hand - there is a thread about these guys somewhere), for $90 a pop (225/50 R16)
2 had 100% tread, and the other 2 had 99% tread.
They were great tires, had plenty of grip, but didn't last very long - about 18 months I think (everyday driving - no burnouts either). Could have mde them last 2 years if got a wheel alignment.
Anyhow, back on track.... I think those guys import them second hand from Germany, so I dont see an issue (besides maybe the cost of getting them here).
Good luck