The SmartTurnSignal system and the piezo/LED reminder mods got me thinking...

I can see the back of the stock lollypops and at night can see them blinking at the top.

Why not improve on that and open a hole at the back thru the reflector and insert a lens so you can see it from the back?

If you can find the right lens with a brim you can sandwich it between the housing and reflector.

if I get your gist
a small (size of a match head) stick on w/p yellow led on top of the housing