Ity's been asked for years (in fact, when ARR was first launched), and there was a very long thread about it - the community team responded that they've passed the idea onto the development team... and nothing more was heard about it, so it can be assumed that the accountants decided it wasn't worth the expense and effort, sadly.

Of course I'd love to have a statue of Enki too, but yeah, I think SE just consider it too much of an expense to bother with.