New Rear Speakers dont fit 6x9's

[sarcazm]

I just bought a 94' accord lx and took the blown rear speakers out and attemptedt o replace them however to my suprise the 6x9's I bought would not fit. They were too small for the hole. The speakers I pulled out looked to be maybe 6x10 or 6x12...Some odd dimension I have yet to come across in my speaker changing. Any suggestions on some fillers or some method so I can have these speakers in my car and playing?

By the way, my passenger speaker wire must be dead because I cannot get that side to function for anything. I tried the intended speaker all around on the other wiring areas so I know it has to be the wire. Has anyone tried using the wiring from the rear speakers for the ones up front? If I tried it, that would mean I would have 2 speakers running off of the same wire. Anyone recommend that? Thank you for reading, any responses are appreciated.

[AccordCodger]

I would have 2 speakers running off of the same wire

DON'T do that - halving the impedance (which is what two speakers in parallel will do) can blow your output transistors.