There is a distinct reason I placed this in a Backdraft subforum and not the general Cobra section. And I thank Doug for reading my entire post before questioning it.
I have a couple from superbrightgunnerleds.com at the shop that will not fit in the BDR housings and are not as bright when side by side if anyone with an ERA wants them cheap.
To get comparable light you will need the 3 LED version and due to the stepout of the housing they do not clear:
