Hi Bob,
last time I resealed my airmatch 600 I used a seal set I had bought for a fas 604 - MOST but not all the seals where the same sizes. The only seal I recall being tougher than your Aldi seals are likely to be is the piston seal - which if I recall correctly (this was 15 years ago!) was a translucent material (and I used the FAS one).
Cheers
Frog