Deaver probably has a long wait but is worth it if they are as good at car stuff as they are at offroad stuff. You can also try Atlas spring or Hollywood spring Do a search for shops in socal to de-arch springs, there are tons of shops named inthat thread.
I have two springs laying around that I dont need. One is abut 39" C to C the other is about 37". If you can use either one of them their yours.