sheep skin seat cover

Possibly Alaska Leather?

I'm thinking the SP-2 has a double-wide bench style seat, ~30 inches wide? If so, outfits such as Ultimate Sheepskin can make you one. They do offer a 50" ready-made bench seat cover near the bottom of this page: https://www.ultimatesheepskin.com/product-category/seatcovers/sheepskinseatcovers/cartruckseatovers/ as well as custom sizes. Maybe search for a cover for the rear seat of a CJ Jeep?

We use a simple sheepskin seat cushion in our single wide sidecars sorta like the one below, which can also work for one passenger in a double wide - also might be able to put two of 'em together side-by-side. They do move around, but sure help with the summertime sweating on the vinyl seats.

Thanks for the note. The stock seat is fairly small. About 41 inches down the front and across the seat. 20 inches wide at the most. Ride safe. Jim

You might try the local auto parts house if it's a solo seat.

Ikea .......... sheepskin, make your own.
http://www.ikea.com/us/en/catalog/products/70026822/