Looks like hundredth monkey is making some more bounce caps. I saw one of their old caps and thought it was cool. Proceeded to get domed the next game I played in and have coveted a bounce cap since. When I went back to the store they were sold out.
They have a pre-order going for the 2012 version of the bounce cap now according to their site. Home Page
More info on their Facebook page here: Hundredth Monkey | Facebook