You are 100% going to be OK, mechanically the parts are the same, just the logo is really all that is different (In Canada at least). I am going this weekend to get new doors at the junkyard for my 2005 Aveo, from a 2007 Pontiac Wave.

Think Chevy Cavalier/Pontiac Sunfire. Mechanically the same car, discontinued since 2003 and parts are still real easy to get.

Also if you want dealer service, any GM dealer should be able to help you with a Pontiac.