Door Marker Light O Ring

Does anyone know the specification of the o-ring that seals the round marker lights on the end of the doors?

 

I think it's more of a "base gasket", and comes with the light??

Maybe someone knows better.......

 

That is a better description.

 

I can look and see if I have a spare, or could trace one out for you....not sure you can get it, without buying the whole light

 

Thanks, it looks like a pretty standard o-ring. I can measure the diameter (thickness) of the piece I have. The one on the other side may be OK so I could measure the both thickness and I.D.

I figured a specification would be more accurate but it may not matter in the end as there is some flexibility in the rubber and it is not a high tolerance fit.

 

I just took the old one to the hardware store and found an O-ring that was close to the right size. Had to slightly stretch it but it passed muster at a recent concours.

 

I am hoping the one on the drivers door is intact and that I can do the same.