Well the good news is that it’s definitely feasible - our (EHG’s) own avatars are proof of this.
There’s two possible ways for that to go down. The first is a relatively small fee where we take an existing image, attempt to check it for potential copyright issues, then set it as your avatar. The second is a significantly more expensive option where we have an artist create an image based on your description and feedback.
I assume you’re talking about the latter. While we’ve quite a large art team - compared to the rest of the company - that team is comprised of people working on animations, skill visual effects, concept art, and so on. It wouldn’t be a matter of just having anyone on the team available so much as needing to assign someone in particular - likely the same person who created most of our skill art. Unfortunately I don’t know when he’d have the time to work on multiple custom avatars (and potentially multiple drafts of each, at that).
I can see us discussing avatars for potential inclusion in future supporter packs. While I’ll bring this up at our next meeting, I can’t see us acting on anything prior to that.