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www.rad.com/10/Carrier-E ··· ce/2280/Probably way overkill, but would work... They sell both SM and MM SFP's for it (uses proprietary modules, though...)
How's AT&T handing you the Gig-E anyways? As SM fibre, or as a 1000baseT? If it's 1000BaseT, BlackBox provides a ton of Copper to MM adapters...