Bah, I lied Ben, mine are black. Moss cat. page A12, Top left, Vintage style Seatbelts.
2-Point Belt, Long(38" adjustable clasp side, 30" tongue side) #222-235 $23.95
They role up nicely and hide behind the corners of the seats.
Most shows want you to have a fire extenguser, Moss has a chrome one, and a First Aid Kit as well.