Well here's how to do it and use the STOCK serpentine belt.
1) Remove the A/C compressor
2) take it apart.... you will NOT need the back half of the housing or ANY of the internals

3)The ribbed pully that is on the AC housing is held on by a C clip and thats ALL that holds it on... you do NOT need the shaft or the outer piece of the pully.... the part that fits over the AC shaft with the teeth in it.
4) All you need is a long bolt, 2 washers, and a nut. All this is needed for is insurance.... in case the c clip ever fails the pully wont go flying off and damage the belt.
Here is what it should look like when its done.......



The reason I did all of this is simple.... its a major PITA to find the right sized belt when removing the AC, and a "dummy pully" cost anywhere from $60 to $120 depending on how much your dealer likes you.






i have teh part # some where
not a 100% is been like 2 years since i done it 
treadmill
Linear Mode
