These Mics are highly sensitive, and be setup to use a 9v battery if you don't have phantom power. You can put them into pretty much anything, and they can be made pretty small.
Step 1: Phantom Power?
The schematic below shows the 9v circuit. You know that you'll always be able to use phantom power with you mic, you can just leave it out to make it simpler.
Step 2: Build It!
Step 3: Build It!
Step 4: Try it out!
For more info, and more detailed instructions, check out this web site: