It's similar to Socata. The main MM is c. 1988 unless you have the GT in which case it is 2001. The latest pages I have seen are c. 2005 but they don't contain anything relevant. Production ceased 2002. The requirement for the $1000/year ATP subscription, just to get an exactly identical CD every month, therefore seems silly. And the SBs and ADs can be found separately, at no charge.
As I mentioned. socata.org carries the MM free anyway but the principle applies equally to other, long obsolete, types.