Sorry I missed this. The LED units are custom and might be difficult to replace. I dont have any more or Id just give them to you. The two halves are just epoxied together and are "threaded" like a nut and bolt. So you can actually open them up to see the problem. More than likely the units have been dropped and broke the led. thats normally the case. Be carefull not to scratch the housings but you can open them right up.
JD