If you see a pattern you like would it be possible to contact the copyright owner and ask their permission to sell items knitted from that pattern?
The worse they will do is give a flat refusal, and they may even say "Yes". "Yes" may come with conditions, but if these are minor ones like "You must state 'designed by Name Of Designer' on the item" it may be worth it.
An English Knitter (nationality and method).
FO: Downton Hat
Call me either Clutter or Julie (my real name), if you find it easier to type than Dclutterchique.