Check the classifieds section on here, yotatech, and Craigslist for a used one. Seems like the best price is from Toytec, however I ordered through a local 4wd shop who ordered from Toytec and got an even better deal.
I paid $736 for 4 springs and the sport shocks, diff drop, and TO spacers. I didnt have to pay shipping either. The shop even assembled the struts and coils for me free of charge.
Anybody live in the Portland metro hit me up for the shop name and location. I believe they are also a vender for Trailgear.