Powering the Butterfly Labs BFG0005G ASIC Miner
If it's the 5GHs in this picture:

https://i.pinimg.com/originals/30/5e/a0/305ea076f1dac979e04f44cb4de04ed5.jpg

Then the power adapter looks like 12V @ 7.5A. You might even find one on ebay (check the connectors look right in the photos think you want barrel tip)