aftermarket radio install? kits available?

I found the speakers I wanted, then bought them cheaper on eBay. I actually bought 2 -3.5" and 2- 6 X 9 Infinity Kappa, I had a Kenwood 12" sub, bought an Alpine head unit and a Polk Audio 2200w 5 channel amp all for around $900. I put the 6 X 9's in speaker boxes behind the rear seat in my Dart Sport. Got some pics of the front speaker bracket.

It's easier to do when your dash looks like this! I was installing a new dash pad.
View attachment Dash pad install 1.jpg

Speaker bracket with new speakers. Also OE speaker to compare.
View attachment New speaker mount 1.jpg
View attachment New speaker mount.jpg