Hey there, I'd be happy to work with you on these shields, if you click on my profile on freelancer and check my portfolio you can see some of my work, and it also includes a shield I previously made for a game!
I work with Maya for the modelling, UV, materials and optimization, sculpting on Zbrush and texturing on Substance, everything ends up ready for a game or animation.
I work with PBR, most of my works end up with diffuse, spec, roughness and metallic maps, with emissive and opacity maps if needed.
If you message me we can discuss this further.