Well, there is a website
that sells 13 inch plastic casts, if you're just looking to use it as reference. I believe the site is maintained by Asaro's granddaughter or something.
98 bucks for the head and a booklet, a bit pricy, but I don't think a 3D print will be cheaper. Plus this way you support the artist, or by proxy at least.
Oh forgot to say this the first time round, thanks for the pix, swiz.