From - http://www.mmowned.com/forums/model-...-archmagi.html
"Antonidas" / HumanCaster Reskin
http://www.wc3movie.com/resources/patch-L.rar
"Robes of the Kirin Tor Archmagi" / Blue Linen Robe Reskin
http://www.wc3movie.com/resources/patch-R.rar
I went ahead and did a quick edit to make it fit the robe model, there are a couple of texture errors/inconsistencies, but they are largely unnoticeable unless you're bald and are swinging your arms in the air wildly.
I suppose the best example of that would be a female Orc dancing.
But as long as you're not doing that, it looks largely fine.
This skin was originally designed for the old Human Caster model, so some of the things may be disproportionate or may stretch a bit, but not by -that- much
This replaces the Blue Linen Robe directly
Blue Linen Robe - Item - World of Warcraft
If you'd like it to replace a different one, I might be able to make a specific one. Let me know