monsoon

I’m looking for a rear deck speaker for an 07 grand prix with the monsoon sound system. specifically the 10392738 part number. Anyone know where i can find one?

I am looking to install an older aftermarket head unit (JVC KD-G340) in my 2002 pontiac grand am and I have been doing some research on what parts I am going to need for this. I have installed head units in other cars before and I am quite familiar with it. The issue I am having now is that this...