So has anyone of you out there some Artworks of them. Also I'm searching true the Fulgrim for stuff thats describes them. There look and there armour.

for now I have:

Julius: patrician features, pendant of firey amber, golden bresplate, sword, carved eagle on his armour

Lycaon: ?

I know thats not much and i'll keep searching, but maybee some of you have an idea where I can finde more Stuff. thx.

As far as I can remember it says nothing about how Lycaon looks like.
As for more stuff I dont think they exist outside Fulgrim so to speak.

Update:Something to add here,Found a pic of Julius
Kaesoron and command squad, pg,194 Vol 2 bottom pic of the
HH artbook,hope that helps! :)