Disco 2 Rear seats.

Hi. After buying my first discovery a 2000 td5 I've spent the last week sorting a few things out. Firstly the guy I brought it from had removed the rear seats in the boot. I've put the drivers side one back all ok but the passenger side doesn't fit. It looks like the rebate the seat folds up in doesn't seem deep enough as the seat sticks out and is about 4" passed the clip in the floor. Also anyone know where I can get a cheap set of side steps. My girlfriend pregnant and finds it hard to get in and out. Cheers in advance Mark.