Had to call over town but finally found it in a 10 Torx socket set (E5 being the smallest and E20 the largest), locally (in Knoxville, TN) at National Car Parts. If you have one of those in your area, you might try calling them. A company by the name of ATD makes it and it's part number ATD-178. Cost was about $20. May never use the other sockets but I have them for other possible future use, and the E5 worked fine.

Word of caution...had several places I called tell me, "yeah, we have it." and when I drove out to their store and looked at the 5 piece set they were selling (including Sears), the smallest was an E6...so if you call and they say they have it, ask them to actually go and look on their shelf, and emphasize, "you sure the smallest you have isn't an E6?"

Good luck!
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1998 S70 T5 Emarald Green Metallic, 2004 V70 2.5T Ruby Red, Previous Owner of Black '94 850 Turbo Wagon