hovobators are cheap, and many people use them successfully. I think you can find them at the beanfarm. If you have any local chicken hatcheries or related science shops, you could probably find them there as well.

You can also make a home made one out of a cooler or small aquarium. Set it up so it's very humid, 90-95% and with the appropriate temperatures you are looking for (83-85F?)

Ian