You might look and/or speak to someone involved with something like a Circus or any other venue where they have so-called "dangerous" animals.

Also speak to insurance agents about "Public Liability Insurance for Performers".

I'm half awake at the moment, so I'm not doing an extensive web search, but that is basically what you would be looking for. Same thing people who dance or juggle with fire might be required to obtain (Hmmm.....speak to the people on the bellydance props tribe?).....

Despite the fact that we know our babies are sweet and gentle, it probably isn't a bad idea to have something like this in case you run into that fruitloop who touches when told not to.....or "claims" they were harmed....(heck, I work for lawyers.....there are people who would CLAIM they were harmed merely by the presence of the snakes because of their so-called phobia).....

One word of advice though.....(and I'm hoping maybe there is a snake dancer out there who is or knows an attorney or two)....when you find a policy, don't just immediately sign. Read the fine print! Just make sure that, if something DOES happen and the insurance company has to pay someone, they can't require you to have your snake put to sleep or something like that. Probably not a likely clause, but it's still something to watch out for. Better safe than sorry.