There are companies which offer litigation insurance (someone I know recently got some for a potential lawsuit). But AFAIK, they generally require you to presen

There are companies which offer litigation insurance (someone I know recently got some for a potential lawsuit). But AFAIK, they generally require you to present your case along with expert legal analysis to them before they'll even set a price for the insurance. Which goes back to one of the problems with patents -- there are so many of them which are bogus, how could you ever do a truly exhaustive review of potential infringement?