I had bought a G&G Turbo fan set some time ago but it broke

I found the little fan to replace the broken one a while back and now I dropped in into the G&G little mount thing. Fit perfectly, exact same fan. One problem is I lost the box that holds the two double a batteries. Anyone know where I could pick one up (maybe some kind of hobby shop?) and what it would most likely be used for or called. It just needs to have the little switch too.
I'm sure they exist for some other reason that building these fan sets.
Here is a picture in case you don't know what I'm referring to: