Update : I ordered the led handle light to see if I could retro fit it into an unilluminated handle. $16. On Amazon .
I removed the handle and the base is hollow,(someone mentioned that) the clear bar is glued into the base .the replacement led will fit in thru the back of the base. It would have to be glued into position.
I found the process of ‘fishing’ wire thru a hole you would drill in side- behind base - daunting not impossible. It would require a removal of paneling (that holds existing control switches ) not for anything other then accommodating the wire fish to get the light power wires down to the stairwell light to couple it. At least that’s the process for my Outlaw.
I made the decision that having an accent light was not that important to me based upon the time and work to accomplish this retro fit would take me.
Even with all this time we have now for projects for me it wasn’t worth all the cussing it would cause.