Try Wescar. They have a website. I use a Wal-Mart Group 27 as a base. I have ordered a bunch of them for myself and friends. I have always been happy with their kits. It won't fool judges at a points match, but for cruise nights and local car shows, it is a nice touch for $$$ spent. About $30, plus battery cost. The Wal-Mart battery has two large flat push-in toppers. Pull them off, and 6 individual holes are revealed. The kit caps simply push into these holes. They also have kits that have caps that glue to flat top batteries. Red, Green, or Yellow colours.