You can make your own.
It's a beta so it's a bit quirky, but it works. Set Wav as the recording device and use a program to record the WAV files. Windows Sound Recorder is what I used.
You can do sweeps or single frequencies. It's easier to set the max before the min and, enter new numbers, then delete out the old one... You'll see what I mean if you use it. I think there are other tone generators that may or may not be easier to use.
Linear Mode
