hey, as creator of the avatar in this post my best recommendations are to find the glamrocks on sketchfab and to remodel, fix them and adjust them to your liking on blender. as for seperate assets such as hoodies, chest fluff, hair etc, can also be found on there and other websites such as gumroad or again, making them yourself if you have any modelling experience. it will take time, but its all i can suggest.
