How Can I Search for Files with Non-ASCII Names?

I have a folder with 1,500 folders in it, each with about 10-200 files. Some of these files have characters that cause problems with my MP3 player...such as a symbol that looks like "-" in windows, but is not "-". I have already cleaned that one out, but I still have some others that I have not found, and that I don't want to search for manualy.

I need a software that can search for files, finding only files that have characters other than the 26 letters, 10 numbers, the "-", "_", and "!"...does it exist?