Salve, Tiberii Cilnii —
Were you to get such a maquette 3D-printed, I'd be interested to buy one (if affordable!). Julian's story, even in its sad conclusion, shines out of history like few others.
I should mention that while we use this image as one of him, it is argued that it is not in fact an image of him, but of a priest — a legend on the site displaying the 3D image says this:
"En fait il ne s’agit pas de l’empereur Julien, mais d’un prêtre de Sérapis, comme l’indique sa couronne." (English: In fact, it is not of the emperor Julian, but of a priest of Serapis, as his crown identifies him.)
Nonetheless, in most minds this image resonates as the one of Julian II, the unlikely philosopher-emperor of Late Rome.