You only open to stock maglite heads? I have a machined head that fits on a maglite and is way larger than the stock head (has a reflector too) PM me if you are interested and I can send you photos, if not and you want to keep the stock head then you can just ignore this lol
I have purchased some 3C Defiant LED flashlights from homedepot. They were like $15 for 2 of them. I used those in some Maglites I built for Christmas gifts. Deeper than Maglite LED but 2mm thinner. Still fit thought.