You best best is a lot of work. You could use freelancer sites to request a 3D modeler to render and pose your character, and have them export it as a stl or other file that a 3D resin printer can use. This step can be very expensive depending on who you use. Then use a 3D printing service of your choice. Then either paint it yourself or find someone else to do that part too. It will most likely set you back $500 or more easily unless you want to do a lot of it yourself.

The raw character files in game aren't really friendly for assembling into something useful for 3D printing.