Here's the link from the supplier - Beam's Industries.
http://www.seatbelts.net/products/wsch256.php?list=4
That was the style belt I used, it looks pretty close to OEM. You'll have to measure and do some checking, but IIRC I used the one with the 12" plastic sleeve for the receiver and just pulled the belt out of the sleeve so it would be the right length to reach up onto the lower seat cushion. Hope that helps you!