i have some spare MDF and can make some adapters if anyone needs. $17 shipped each set of adapters (deals on multiples)
6x8 to 6.5s/5.25/4s and a tweeter
6.5 to 5.25
6x9 to 6.5s/ 5.25 and tweeter
let me know what u need. i can also flush mount the speaker with some 1/4" mdf on top of the 1/2 or 3/4 mdf.
PM me with what you need and i can ship out this weekend or monday.
(heres an example of a 6x8 to 6.5)