Look at this on eBay http://www.ebay.com/itm/322333718791

awesome! what do you run on the orange pi, is that retropie as well? how well does it work? and how's the performance compared to a pi 3? btw, i am currently building a custom nes mini as well, but even simpler than yours, using a pi 3, case , arcadeskin stickers and 2 8bitdo Nes30 pro controllers ...