Mobile Bay Reef Keepers

Looking for a hang on back overflow for my 20 gal. nano that i am thinking about setting up to help me get over the disaster that happened in my 110 reef when i moved it last week... i lost 75-85 % of the acro in my reef cause the power went out a day and a half after the move and was out for several hours while i was at work.

so if anybody has a overflow that they might be willing to part with please let me know...