I`ll have a dig for some power steering info. There`s a conversion on the market for discs on the S3 by somebody or other - can`t remeber who at the moment, but I think it`s the same lot who do the timing gear conversions for the 200 / 300 tdi engines. I`m sure theres also a conversion using the axles etc from the Spanish Santana Landies, but I think the bits are a bit scarce. (and expensive!)