Another squeak/rattle...help please

[TXSUT]

It's a noise that seems to be coming from somewhere in the vicinity of the interior fuse panel, and sounds like the all-too-familiar sound of a styrofoam cooler squeaking. It happens just about at any speed, all the way down to .05 mph (vibration from the tires). I pulled the panel cover off and searched there and up under the dash, but found nothing.

Anyone else have this one and found a cure? I really don't want to spend my weekend disassembling the dash looking for it.

Thanks,

Pete