Be sure to stay away from cheap power supplies. They will be rated at 10V, but will put out 15-18V. Get something of at least decent quality. Switching power supplies are best, but can be hard to find at times. If you're up to a little hacking, a computer PSU works quite well. They usually have several voltage levels available, 3.3V, 5V and 12V (along with negative values of those voltages). The 12V rail would work just fine, just run it through two or three diodes to drop the voltage a bit. However, that might be a bit extreme
, especially if you should
be able to find a good 10V power supply for fairly cheap.