The 6A engine can be found in the Audi 80 2.0 16v's of the early to mid '90s. This engine is basically the
same as the 9A except for the fact that it is fitted longitudinally in the Audi (as opposed to the transverse fitment favoured by VW and Seat), meaning that a few more parts need to be swapped over onto the 6A in order to get it to fit into a VW than would be the case with a 9A. This fact makes the fitment of a 6A slightly more complicated than the 9A or mk3 ABF, but has also meant than many more of these engines have survived in scrap yards and have not been snapped up for conversions by other people. There are plenty
of these engines available in normal (i.e. non-specialist) scrappies and you should be able to pick one up for under £200. A further benefit of these engines is that the cars they were originally fitted to were not out and out sports cars and have consiquently not suffered from years of thrash. All good news.