Seriously at the price those lights are I'd just as soon buy a new one. Finding the parts online, the shipping would probably cost more than a new light. Plus reflectors will be a pain to find. When my 606a had alkalines go off inside and ruined the reflector I actually just sanded off the reflector and goldkote underneath the reflective material and used a dremel with a small polishing cone to polish a mirror finish to the aluminum it throws just as well as before with no appreciable decrease in output.
But even better, there are so many better lights available now than that 606a. Too bad the Solarforce L2R is discontinued and very hard to find, maybe you can put a WTB up in the marketplace, but it's the same form factor as the 606a, 2xAA, but it's waterproof and has a replaceable P60 module so you can always upgrade the led in case of improvements or if the module gets damaged. I find it's one of my favorite lights because it takes regular batteries and the quality is top notch.
