Does anybody have any experience with filling prescriptions out of Canada?

I am currently on a titration and weaning program to gradually increase Lamictal and then slowly wean me off Trileptal. However, I am having side effects of drowsiness and dizziness. The neurology team has decided to try changing my meds from the generic Lamictal (immediate release) to the non-generic Lamictal XR (extended release) in hopes that would correct the problem.

I have insurance which covered the generic Lamictal this month with a co-pay of $40. But I will go over my cap soon which will cause the non-generic Lamictal XR to cost $1000.

Any help or suggestions about filling prescriptions in Canada via mail order is appreciated.