Technical Area for all the problems you have in the garage
As far as my limited knowledge goes, Hawks have always used AHT20 variants. When I last spoke to Gerry, he had chased the suppliers for new a batch that were going to be AHT20A (don't ask me what the difference is!) which was scheduled to arrive right at the end of June. So if you get on the waiting list soon you might not have long to wait!