When I used the "Fit My Car" tool at Crutchfield, this speaker showed up to fit in my front door of 07 Tundra Regular Cab.
JL Audio ZR800-CW Evolution™ ZR Series 8" component woofer (midbass driver) at Crutchfield.com
JL 8" Free-Air Midwoofer. Looks like it could really add some bass without having to put a speaker box behind the seat.
I also found this one.
Kicker CompVT 08CVT654 Shallow 6.5" subwoofer at Crutchfield.com
Kicker Comp 6.5" woofer.
I would like to add some more bass in the truck without loosing the nice storage space behind the seat. Would you go with this or try and find a shallow mount 6x9?