I don't think that any insurance company on this planet would give a business(!) an insurance against lawsuits. If you have serious money, you can try the famous Lloyds in London, though.
But honestly: Businesses get sued all the time, its part of the normal life and suing is also a very normal way of doing business - you better get used to that thought.
What you have to do as a business owner is to put aside some "battle money", that means money to pay your lawyer(s) with when you are sued.
And sooner or later, you WILL be sued: By sue-happy customers, by other businesses who think there might be some money in it for them and who will claim that you stole their intellectual property or violated their patents in one way or the other. Whatever the reason might be: You have a business, and you WILL see a court room from the inside.
You should also make sure to have a trustworthy(!!!) tax counselor.
By the way, it is called "EULA" (End User License Agreement), not UELA. You better make sure that you have one that will hold up in a court of law. The same goes for your "general terms and conditions". Have a lawyer who is specialized in these things check them.
This blog from Wil Shipley, who is quite successful at what he is doing, might help you as a source of motivation and advice:
http://wilshipley.com/blog/2005/07/student-talk-reloaded-podcast.htmlYou will also find some valuable advice on Paul Graham's website:
http://www.paulgraham.com/articles.htmlIn general, I would say: Don't worry too much about these things. Make sure that you have sufficient amounts of money saved to be able to cover your business and living costs for at least one year and also make sure that you can afford a lawyer and a tax consultant.