Resurrecting kind of an old thread...
I see someone posted a link to this some time back. Recipes for making your own Bay Rum aftershave. Homemade Bay Rum Aftershave | The Art of Manliness
A friend of mine makes soaps and lotions and sells them for a living, and she found this recipe here when I asked her about an aftershave.
It looks much better than the ones on that art of manliness page. Has all the other goodies that the name brands charge extra for...Witchhazel base, instead of alchohol with some witchazel in it. Homemade Aftershave
I'm probably going to try some different varieties...add some lime or grapefruit. Some patchoulli or sandlewood extract as well. If I have good results I may try making a big batch up and bottling it and selling it. My friend who makes the soaps actually had to take her site down because she has ended up with so many wholesale back orders to fill.