Where can I get polarized progressive sunglasses?

[cheap eyeglasses]

Why is it really difficult to order sunglasses lenses in progressive styles? I have been to many eyeglasses site before I write down this tip here, by the way, I need polarized lenses, the optician told me that the procedure of fabricating my lenses is really complicated, polarized lenses are already not easy for them, not to say add another “progressives”! but I really need these lenses, and I am sure there are some optician can satisfy my request, anyone can do me a favor?