I used 1986 rear cherokee, I would look for them at a junkyard though, I bought mine from Napa and they were 20 some dollars an arm.
Don't quote me, but I think even the big size bronco arms might work. I took off my dad's and it seemed to be the same thread and it looked like it would snap on, the spring looked even beefier then the heeps, but I'd double check and of course you'd still have to shorten the arm.