There are quite a few Macross and other mech related STL files via sites such as Thingiverse, Cults3D, creator's own Patreon accounts, Facebook, Etsy, and other sites.
I hope this topic can act as a list/archive of links to such files as a resource for those of us with 3D printers.
It should be noted that while many files are free on sites such as Thingiverse, some must be bought from the creators themselves.