Here are some of the suppliers I have used and have been pleased with:
Purchasers of my zine were very impressed with the quality of the paper and the print colours.
Gill was the first to inspire me to think about images as collections - whether that be triptychs or panels. And she also introduced me to the idea of intimate landscapes and seeing landscapes as a portrait aspect. I have joined her on many photowalks, day and residential workshops.
Brian Lloyd Duckett also provides lots of good advice on developing projects and exhibiting work.