For the back half, also a lifelong Germany A2. Slightly less mileage with approx 60000 on the clock. For what its worth, its not completely unusal to have mis-matched halves. There are plenty of others floating around here in Canada.
The ones ending up in Italy are notorius for being mismatched. A1 fronts mated to A2 back halves etc. I'd say it's a miracle two Canadian halves were mated