I have an older UK SL4 dive light. Yet after about 30 years it works perfectly. However, when my wife and I were getting our equipment together for a refresher, I found the bezels had cracks and worried the light seals would fail underwater. So I went to the website and lo and behold, 30 years later the product is supported and parts were available with the new bezels fitting perfectly and appear to be even stronger than the original clear ones. I also got new O-rings but the original ones seem in great shape so I have kept them as back ups. And the website had a glitch preventing me from ordering directly as I live in Hawaii, but a single call to the manufacturer took care of things no problem.
Canʻt recommend Underwater Kinetics strong enough.