Pretty much any mask can fit a home made fan. I have one in my profiler and it keeps my glasses from fogging!
A small 25mm fan cost me about €15. Some wireing,, a 9v battery plug, and a simple switch costs me about €3. Some glue and other attatchemnt materials was €2. That's a goggle fan for €20 (~$25)! Those special fans made for some mask are double that price!