Where can I find a white lined possum/tanaka pygmy wrasse?
 

I've been searching to no avail and my LFS is useless right now in finding one. Does anyone know where I could order one from?

You can try contacting one of the sponsors. They may be able to order one. You might have to wait until the wholesalers get some to Canada.

As said above
Try contacting the forum vendors. Most offer shipping of livestock.
Incredible Aquarium is a bit closer.
But I have personally seen J&L Aquatics get them in.