I have a Marvel vs. Capcom set that had it's battery replaced in 2014 right before I bought it. I checked it last week and the changed battery is at 3.7V and has not leaked, but is overdue to get removed. I see since I have been away from the hobby, the community has made these small boards with solder jumpers to inject code into the game to bypass the original battery and no longer requires...I think they were called Phoenix ROMS? Anyhow, my problem is my searches only show vendors in Australia. Is there a good seller online for the USA region?