If you say you were told that they have a warranty, do you have that printed out anywhere? I know that if I purchase something without a warranty and it breaks or is faulty, then I am at the mercy of the company and do not EXPECT to be given any special treatment. If they do offer me something it is only a bonus.
Did you really expect them to offer you something? If you were in a business where you offered people warranties when you have no control over the manufacturing, you would not be in business very long.
As far as PIAA, I had contacted them a while back, and although I no longer have the email, they replied that all of their bulbs come with a 1 year warranty. So there you have it, stick with stock or PIAA. [/B]