I made one for my boss, he supplied me with a Duracell penlight with two batteries and perfectly fit in a euro profile cylinder. i remove one battery, cut off the nose tip of the tube, fabricated a 3/16 clear plastic, countersunk a bit on the plastic for the light correct centerline, applied super glue on the plastic to be in place, fabricate a dummy battery extension, and reassemble. its good.
hi everyone, im glad to be a member of this very interesting community, our community of locksmiths. i hope i could help others, within my ability, and hope you can help me too, God bless us all fellow locksmiths.