I actually just installed my STS kit today...got it for $86 from www.webelectricproducts.com
and let me tell you, that was the WAY cheapest I could find. Next was like, $130. Took like, an hour at the most to install, and I put in aftermarket taillights at the same time. Hopefully I am going to get some pics here soon, but I def. reccomend web electric for the STS kit, its cheap and fairly easy.