I swear I saw an on-line vendor selling them at a pretty decent price, but I can't seem to remember the vendor or find it in searches. It seemed like it was a very new vendor here, but I could be wrong.
Anyone know who is selling them?
I know some sell Fresnel lens, but they are much more expensive.
That will be a BIG piece of glass, if you want a relatively short focal length… 
i have one, i found someone selling people’s junk on the street and i found it shining on his table i bought it for about 4$
but really i have no idea what i am going to use it for but for testing i have tried it with MT-G2 runing at 7A with holding it by hands wooh it was shining beam and tried it with dedomed XP-G2 it looked like more laser than a flashlight beam, well what you will use it for
lovely !
My gosh! That doesn't even have a lip contributing to the diameter. Quite a find there gamezawy
Fire starter…