Unless you feel like a drive, you're going to have to troubleshoot all your idler pulleys yourself. www.INTENSE-Racing.com is in Westerville. Real Pros. In your case, it'* PROBABLY the idler under the coil packs or the idler on the tensioner.
The idler under the coil packs has a lot of play in it (lateral movement). That may be my noise, but it sounds like it is coming from futher back than that. I will try replacing it and post back on the results.