Rock auto and most US part suppliers will list 2.3 parts under GrandAm , as the 2.3 was never installed on the american market TS. I bought an ignition module and crank sensor (3.8) new from e-bay, no problem.
A a comment to former posts about charging circuit, there is a fusible link linking the alternator and the starter, ( the tie point to the battery) , located at starter on V6 models.... A shorted alternator will blow this link and then a new alternator will not do any good until the link is replaced.