Hey there,
Have you tried looking at optical4less?
http://www.optical4less.com/ourlens/#156trans
They sell them at a good price. I have not tried their photochromic
lenses but as a regular there, they do provide good quality glasses
and very supportive customer service. I'm sure you would be very happy
with the outcome they provide as I have.
Best of luck,
Elgin.