I'm doin a 31 5 window,don't know for sure but I'd bet the width inside is pretty close to the same and I've found nothing that is narrow enough, thought the nice leather 3rd row seat with incorporated lap & shoulder belts outta my wifes 02 yukon would work but it was about 3-4 inches too wide (ya shoulda been there when she caught me trying to see if it would fit "LOL") only other thing I've found that might work is the rear seat from a saturn although i have'nt had the opportunity to measure, I think we're stuck with buying sumptin.......