It looks like ghostscript already exists, at least it's in the SDK. I tried to build a2ps which triggered a real huge bunch of build dependencies, however a2ps-perl-ja is pretty small. For further testing on the weekend I'll stick with that one for now.
I'll check for lprng as well if I'll find time.
I'd test sending files to the printer right now but my daughter is sleeping and I don't want to wake her up - printer is not very silent...