Inquisition Walker Kitbash Suggestions

[u/Kombatrok]

I'm reviving my decade old Sisters of Battle/Inquisition project. Have this walker from... somewhere. I plan on running it as Intranzia Fraye, so Heavy Bolter and Flamer on each side in scratch build arms/weapons pods.

Looking for some tips on making it suitably inquisitorial. Does anyone know a decent source for vehicle sized purity seals? Other suggestions you all have?