There are a few 3D printable models of Castle Clash heroes, including Marauder, Valentina, PD, Aries.
Recently, Castle Clash Russia shared on their VK.com page a new model for Lavanica.
I like it!. This one is more complicated than the previous ones (I've built Santa Boom and PD is half way to be ready).
You can download each Lavanica's sheet from VK.com: Sheet 1, Sheet 2, Sheet 3.
Or from CasClash.com: 3D hero models.