Originally Posted by gregjones

I've done that.

Forget the red lens tape, it comes out pink with even two layers. No good.

I got an old friend from when I was driving trucks to get me a trailer side marker light with a flat lens. I used the bench grinder to "cut" the flat part of the lens from the rest then went round 'n round (there's factory lines on the lens!!) until it fit the housing.

Red and great.

I did see one at the auto parts store--$4.25. It makes a great taillight.