The guys at Bavauto (call them) can get you those - they have a collection of old cats & micr-fische discs and still have access to older parts. There's a huge BMW distributor in NJ that supports alot of REALOEMS stuff that carries stuff - in stock. (I got my M5 factory springs through them for almost less than half$ than ANYBODY was offering - set of 4- $186.00 shipped)