Opinions, sources, LED conversion 2-D cell Maglite bulbs?

I just spent 10 bucks on a Maglite 2 -D- cell flashlight which "I guess" has xenon bulbs, and it works, in fact it may just be brand new "old." Says "Stimson" which I think would be the lumber co, don't know what that is about

So now I'm thinkin "maybe" let's get a quality LED bulb, opinions? It uses the old school "standard" looking flanged bulb, 'xcept it says "Mag 2 cell HK1JO"