Are you looking for a printing service, or places to get the source files to print yourself?
As for printing services, there may be a few "print for hire" smaller operations, but not sure of anything that large commercially
There are lots of ETSY sellers who will sell 3-D printed stuff that they created, but not sure of any who might do custom work done by someone else
One option is someone like .JPG Productions who I believe will do custom print work
JPG Productions. 3,995 likes · 4 talking about this. Producer and molder/caster for resin and plastic scale model kits and accessories. 3D Printing services also available.
What is it you are looking for?