I don't use whiteout lenses, since I have -4 vision and can't really see the point in buying them, I'd be totally blind!! So I just put a white layer over my eyes on like 90% opacity in photoshop, sorry I don't have a link for you!
I really love this cosplay. It is very well done, and I think you have the face for Kankri. I'd forgotten he would have troll teeth, and I appreciate that you whited the eyes, essentially. I love his expression. Fantastic job!