I think you will have to try your luck on the bay or at your local comic store.. the
www.capcomcomics.com website (Udon) had a section whre you could by them but that page became under construction for like a year and now it's changed and you cant find theese bust. I got my self theese
As you can see there is also a regular Akuma...
and I'm waiting for the Bison Bust to appear on the bay. .. Good luck with your search!! they are great looking busts!!!