There's this one also from magnum-powers....
http://www.magnumpowers.com/light_pro_pri.php

 

I think I fixed ALL my belt noise and hi-speed belt slip!

Installed a Thump RRR tensioner and Idler arm. The Mosaleen idler would not work with the Thump tensioner due to the thickness of the base which pushed the bottom of the bracket past the provided spacer. After an initial try to install, I had to put the oem tensioner back on and order Thump's Idler arm which came in today.

Although it's on and working, I need to order a Thump pulley for the tensioner. I'm using the Mosaleen pulley that was on, but it really needs their pulley to be proper.

I'll work on getting a pic.

 

Here's the Thump RRR Tensioner and Idler. It's a little tough to get a good pic of it installed with the fan shroud in the way.