Well I ended up getting a new one today...then later this evening the old one fell out and I have it now too. Its funny, the replacement was just a cap. What I lost was the whole tube with the cao attached, so I put the original back on.

Even better! My battery died last night because I had Halloween music playing while I was handing out candy. This morning after I replaced the cap I jumped the car and then took it for a drive. My engine light has not come on since!!!!