polk audio c-4 sub 6x9 driver replacement

[spec 10+ year member]

i have an oldschool polk c-4 sub enclosure with a couple of blown subs. these use 4 6x9 subs in a 4th order bandpass. nice sq !! does anyone know were i could get good replacement drivers? i could get all 4 if they are not to too expensive.

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[Spooney 10+ year member]

I think tang band makes a 6x9 subwoofer and I am sure there are a few others. Check out tang band at Parts Express: the #1 source for audio, video & speaker building components