Thank you!The book is titled "Flower Essence Repertory" by Patricia Kaminski and Richard Katz from 2000. It is interesting, but fails to give a source for glycerin based products. There are 2 websites that I had written down on the inside cover that might be worth checking out: feelbach.com and iherb.com
Flower essences have been around for a long time. It might be worth researching how to diy flower essences.