Hi!
I would like to help you out with the coat of arms.
I actually had Heraldry and Vexillology as an elective course in college, so I am familiar with the jargon and terms. As well, reading George R. R. Martins works in recent years rekindled my fascination with it because of his meticulous care for the explanation and the creation of the coat of arms and devices of the noble houses in this books.
I have checked the Sodacan's image on Wikipedia and that style is easily reachable. Yes, the vector output is the standard you would get a number of (editable, working, source) files for further use as you see fit.
I would very much like to collaborate with you in the creation, because I respect the craft and the aesthetic of it, and I fear it's a dying art form, so I'd like to take part in it as well.
Please let me know and we can discuss more ideas and details.
Thanks!
Regards,
Marko