Cheaper than most ambi safeties - HERA Arms 5 Interchangeable Multi-Purpose Safety Selector, Pack of 15

Considering this is cheaper than most ambi safeties, it is an excellent deal. It does, in fact, come with the "cylinder" not just the levers. The packaging isn't great, and the cylinder doesn't seem quite as well made as the levers, but for the price neither issue is big enough to deduct a star.