You could fit a bulb holder in the main body by the side or in between the projectors and fit a LED bulb in there that should work. I know what you mean about the rings that's the main reason i took the other one off, and now i quite like the one, its different as all the other kits you see have two.
Im with you on that not to keen on the 2 rings do like yours tho it is different to the norm . I do fancy something like the hawk eye lights (not full rings) might have a look at that could simply do what you did with the one you sprayed over really and cojust cover the top of the rings