HELP NEEDED - 1st gen double cab front and rear speaker replacement (6.5 in front, 6x8 rear)

All,
I am not able to figure a clean way to mount the 6.5" replacements in the old 6x8" bracket or even the hole. I can't find any good explanations on how to do this online, and have tried a few things that didn't work. It looks like its tight clearances once the door panel goes back on, so it will be tricky getting the oval shape to fit over the wider round speaker.

I am also replacing the old 6x8 with a new 6x8 and it goes too deep into the door, blocking the window. Any recommendation on how to bring the speaker out further from the door cleanly?

Front 6.5" speaker and mounting bracket from speaker manufacturer:


Front door without stock mounting bracket for 6x8:


Front door with stock mounting bracket for 6x8:


New rear speakers, 6x8 side view:


Rear door without stock 6x8 mounting bracket:


Rear door with stock 6x8 mounting bracket:

 

quite easy, Go to your hardware store and ask for cut offs. They usually have em there for free.

Just grab a jig saw or router an and zip away. Done deal. You can estimate how much depth you need for clearance and use 3/4 or 1 inch mdf