Unless the frequency turns out to make this design prohibitavely small, try a Moxon: http://www.moxonantennaproject.com/design.htm/
I built one for OTA TV broadcasts (somewhere in the neighborhood of 500 MHz) using spare wire I had laying around and had good results. There's a calculator program at that URL that will give you the dimensions of the elements for any given frequency. All you have to do is bend the wire and find a way to keep them at the required distances.
If your antenna needs to be really small you could get some copper clad from RShack and etch/scrape out the elements.