I guess I could do that. I'm not really sure where to start however. What I have now looks similar to
this only it was designed for a 5x7 speaker and the opening for the speaker sticks out about 3/4 of an inch. I guess I could use some thinner MDF to make the backing plate and then make a ring out of some 3/4" MDF.
Here is an exploded view of my door. Mine is the version with power windows and door locks.
Can you point me to any photos or tutorials that show how these things are designed and built?
Thanks.