You've already linked to them in your first post believe it or not. A selection of the images in my MkVII build thread are from the assembly guides of the various armour packs on my shop while some are behind the scenes in process stuff for those who want a bit more general insight.
I've linked the two you shared images of to save a search.
The forearms/vambraces
[URL unfurl="true"]https://www.skookumprops.ca/shop/p/mk-vii-vambrace-3d-model-for-cosplay-armour-inspired-by-halo-infinite[/URL]
The chest
[URL unfurl="true"]https://www.skookumprops.ca/shop/p/mk-vii-chest-3d-model-for-cosplay-armour-inspired-by-halo-infinite[/URL]