I'm about 6'4" and just can't get comfy in the driver's seat of my 2008 Sequoia SR5 with sunroof. Even with the seat reclined my head is just about touching the headliner and I have no upper back support. Could use a bit more legroom too if possible. I can't find any seat rail extenders, frame adjusters or any mention of seat modifications. I'd even consider an aftermarket seat if there was one that would make a difference. Any ideas?