K20A2 with EP3 idler pulley

I have to replace my serpentine belt soon. I have search the first four pages of Google, H-T, CRSX, EPHATCH and have not found any conclusive part numbers or links. As the title says, I have a K20A2 with EP3 K20A3 idler pulley. I believe I used the stock EP3 although it was tight. I am looking to purchase the correct belt for this setup.

I have seen Talon's thread about washers with stock belt, but it was old and appears no longer reccomended.

I am looking for a part number or specific stock belt or link for this setup. Thanks!

Bump! I know someone knows the answer.

From what I gather based on current information the 64" belt from Napa should do the job within correct tolerances