I use the OMP seat runners from Pegasus for my B5 seats. Just a heads up. If you are over 200lbs or larger than a 34" waist the B5s probably won't be for you.
Ken,
Despite now having lived in the states for 2 years, coupled with my new found love of pancakes with a side of bacon, I've somehow just about managed to keep my 32" waist and 170lb.
Must be all the running around I'm doing buying car parts!