>>> Rick, is there any contact fungicide you can recommend?
Obviously, use a fungicide that says it will kill botrytis. It's a very common disease, so if it is not listed on the back of the container, it won't do the job. Beyond this, take advice from those who have experience using the chemicals, which is not me.
Rest assure, I only eat the lilies I have in excess, and hybrids from my own hybridizing that don't display the best qualities. When you grow from seed and plant them in garden plots, there is always more and more lilies. But if I grew all my lilies in pots, I don't think I would ever grow enough to eat. That would be too expensive and too much work, and I would have more of a sentimental bond with them.
I'm not good at identifying hybrids like that oriental, but with species, I could be your man.