Has anyone seen or come across a 15 mm diffuser that will fit on the end of a Streamlight Stylus Pro that is NOT the cone but a flip down like the Fenix AD401?
NOT this...
... but THIS
Googled it and found only the cones....
Try a cap from a water bottle .
Great in a pinch, but was looking for something a little more.... fitted. Heading over to tap plastics for ideas.
Yeah , a lot of my mods are ghetto .
I have those diffuser for SL Stylus Pro and MicroStream (15mm). It is approx 3.5" long. Comes in orange, pink for now. Waiting for white and yellow.
while you wait, cap from water bottle and hot glue = fitted 
Not quite bright?
Amazing it is bright. The brightest one right now is the orange diffuser next is pink which is equivalent like the red safety wand. If your batteries are strong, it's no problem. I can send picture but doesn't know how to post it. I use it to cross the street at night for safety reasons such as new car headlights are extremely bright, that makes it harder for the opposite driver to see you). I also use it to let friends or relatives know exactly where I am at a crowded place or airport. The beauty of it, it is small that you can carry it in your purse or pocket, unlike those safety cones.