[68Timber]

I would use another Blazer seat that matches the one you already have. I don't know how much foot room you'd have in back, but you know the width would be perfect. If it's a model that latches to the floor and will flip up out of the way you'll keep room for cargo. You'll need to drop the tank to reinforce the backside of the floor for seat mounts and seat belt mounts. That should be a pretty easy job.