Modular Synth Panels

I'd really love to get my hands on a certain symbol to use with potentiometers. The module at this link has them on most knobs:

http://www.ear-group.net/model_14.html

The symbol is that curved "arc" line above the pot with arrows at each end and a plus on one end and minus on the other. If anyone has this I would really appreciate if you can make it available.

Thanks,
John