I have one of these lights and I am also looking for a LED drop in for it. Another thread says it uses 6P compatible drop ins, but I have one that is, and it does not fit. The bottom of it is too wide for the light. The top fits into the lights head with no problem. I am sure there are drop ins with narrower bases. I guess the thing to do is buy one from a vendor that gives the drop in's front and rear diameter. The only vendor I have seen so far is DX, but I do not want to purchase an item off shore. I just started another thread looking for this item when I tripped on this tread! Maybe between the two of us, we will get our answer!!
http://www.candlepowerforums.com/vb/showthread.php?t=169895
Mike