I came across an orphaned VW Quantum and wonder if there is any info as to parts compatability anywhere. The Quantum was not sold in Canada so is fuel pump and delivery system, as well as brakes, suspension and driveline shared with any 4000 or 5000 Audi or VW (Dasher? ) that was sold in US and Canada? Thanks for any help. David 1986 Audi 4kq