How about making your own essential oils? Get a decent essential oil distiller and you can do just that. Many people claim you can make your essential oils at home and there are even a number of methods that have been identified; however, it is exceedingly difficult to get a high enough quality of essential oil from home methods to achieve any therapeutic benefits; and if you are using the essential oils to assist with stress management, you will definitely want therapeutic grade.
If you are going to distill your own essential oils, the first thing you need is training and this will be followed closely by practice and lots of it. Some say that making decent essential oils is an art form, with a healthy dose of science mixed in. One of the most important pieces to the puzzle is obviously going to be getting your hands on a good quality essential oil distillation device. Thankfully, there are lots of options available from places like Amazon.com.