Aftermarket seats interfere w/seat belt latches

Good afternoon. I am the proud new owner of a very little used 08 RZR 800.
It came with an uninstalled set of nice suspension seats the seller said he paid $600 for. I installed them this morning and I like them. The problem is the standard belts are almost impossible to latch because the new seats are more full and closer to the center, leaving little room to reach belt latches. I hope someone has already solved this problem.
The only thing I can think of is to put a 2 or 3" spacer under them to raise them up higher. Any other ideas. Thanks.