[wingnut60]

Well, as I said, have not heard of anyone having/getting lighter/darker tints than standard. Perhaps you can find out who make the windows (Hehr used to be supplier, not sure who is now) and talk to them.
And, having someone say "you did it for XXXX, do it for me" is exactly why they don't do a lot of real customization--it would result in a hopeless stream of requests for custom work that does not fit their production line model, and would slow them down to where they would see the sometimes shoddy work they are outputting...
Hope you find and answer--had not considered your Canadian aspect to light in the interior.