Try your auto insurance provider. That way you can extend the umbrella to your auto coverage at a discounted rates. You may also try your title company that you used to buy your property. Sometimes they offer discounted premiums for that reason.

Umbrella policy, as I understand it, is basically additional coverage of the variety that you already have spanning multiple policies. It doesn't offer liability protection against law suits, which was my initial intention for looking into this. But it's relatively cheap and offers some peace of mind.

Good luck!