I'm looking for a complete system from a laptop case that offers protection with a laptop and printer. Can someone make recommendations here because there are still some on the Internet.
The most important thing is the size of the printer. There are handy small printers (mobile) that will fit comfortably in a larger laptop bag. You should measure it or try it out. How about an aluminum pilot case?
Ten years ago there was a suitcase with printer and modem from the manufacturer Olivetti. Back then it was the M10 laptop. Since then I haven't seen any of these solutions. The best thing to do is to buy a good and stable aluminum case in the right size and assemble it yourself. There are plenty of suitable small printers.
I rarely see anything like this, or not at all
True, it will be difficult as a complete system.
At Telekom we had something like this here: https://www.shpock.com/en-gb/i/WIH5irCnCApPi0WR/laptop-koffer-mit-drucker
