any suggestion to what 3rd party warranty to get?

I checked warrantydirect.com. the price seems high. $4000 for my 2004 X5 4.4 to extend the warranty for another 2 year (6 year total) or up to 100K miles. which is even more expensive than BMW's extend warranty. think about it, that is 2K per year.

too bad I am not the original owner which means I can't buy the extend warranty from BMW (is that true? any other non-offical way to get it?).