Need help with seat on 88 gmc suburban

I need to put in a third seat, or I cant buy this vehicle. the only problem is, is that there is no place to mount the seat at all. how could I mount one? right through the floor with large washers on the bottom side?

the suburban is an 88. the seats at this time are hook in ones, but I would have to uce an older seat that mounts flush with the floor with bolts.

is it possible?


Thanks!