Sometimes finding the right name that's available to register in a .com is very hard. However, if you just do some research and looking you might find one. A .com domain is the preferred extension among most people but there might be something in a .net, .info or other that will work.
Take some of the main words that relate to the industry and look at a thesaurus or even a dictionary website and you might find an alternative name that will work.
Don't settle for a name that isn't relevant for what you are wanting it for, just because it's available to register or because it's cheap. Hang in there and do more research till you find a good one that's fitting.
If you are going to be paying a good price, make sure it's worth the money by asking on here in a thread first.