I have a lot of lights ranging from pre Surefire direct M9 Mount, 15 year old Surefire, ten year old nitrolon, etc.

I have also been replacing batteries with rechargeable.

As often as not, these kill the incandescent bulb.

When I order new LED heads, to replace the R or P60 Surefire size,
I keep keeping “direct replacement” or exact fit items like this:

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Which are too long.

Is there an easy button for ordering these and getting the size I need?