The BAL stabilizers are the only real direct OEM replacement, but they are a bit pricey. You may want to check my thread on stabilizers vs. Scissors. I love the scissors I put on and they are much easier to operate.
Dave TAC# MI-1 Operation "Save Rudy" Strike Team (charter member)
If you go B.A.L. again, their website shows the same stabilizer -- but it's deceptive. Due to location of the frame and the curved belly wrap the shafts of B.A.L. jacks for Airstreams are longer. Might have to go thru a dealer if you go this route...