Well, lots of people can be commissioned for them, but if you want a really nice one, it's pretty pricey.

Yeh! My eyeballs pretty much exploded when I saw some of them sites, but then the first one I looked at seemed pretty good.
Thankfully, I'm good at saving money! It also helps that I'll be applying for a job soon, and I've got a money reward (given to me by a science academy that I successfully attended) that I may be borrowing from.

But, as a question of curiosity, just who can I maybe ask of a commission?

I really can't remember the specific names, but you might want to ask around on the Anthrocon website.