Woodcraft supply - www.woodcraft.com - has both yellow and white beeswax. You can order from the on-line catalog or from a local outlet. There should be a Woodcraft store in your area - check the website. Some craft stores carry beewax as do some hardware stores.
I would think you could find it locally at an organic grocer's. If they sell local honey, they should be able to provide you with the name of the beekeeper & he or she would be ablet to guide you to a source. Also, check your Yellow Pages under, "beekeeper," and "honey."