tclederman and tomctomc,
Gentlemen,
I have not found anything yet, but churning over some ideas. No, my truck has no factory provisions for radio speakers although the dash was pre-formed for a radio to fit in there, just no provision for a speaker(s). We will not be cutting any new holes anywhere. Don't believe putting anything behind the seat is an option as the gas tank is there. Also don't want to 'hang' speakers in the cab corners behind the seat. Looking like the best option is to mount them under the dash and hope for the best.
John