6x9 speakers

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 have a 2007 grand prix with the monsoon sound system and blew one of the 6x9 speakers on the rear deck and wondering what the brand of speakers are and what i could place in there that would sound equal to or better then the original (also i like bass) (also is it true that the original 6x9's...