I came across these last week. They currently have dual -48v power supplies, but they should swap out with a 110 PSU easily. $84 shipped is almost free.
SUPERMICRO CDE220 BAREBONE CHASSIS 2U 12LFF 2x HS 2x PSU X7DWN+ | eBay
Server Type CISCO CDE220, X7DWN+. Form Factor RACKMOUNT 2U. Helpful Links.