I have a few places online where I have things for sale, particularly my Paint and Words etsy, which sells calligraphed poetry and sayings for your wall, as well as hand-written cotton shopping bags. Everything in there is hand-written to order, with absolutely no bulk printing involved.
There's also my Momentum Mori linoprint project, which examines extinct, hidden or rare animals in a very exacting manner.
For people in the UK looking for something more substantial, there's also the Workshop on Folksy.
However, part of the beauty of what I do is that I can make something entirely different - if you'd like your favourite quote written up for your wall, your D&D campaign mapped, a prop sword from your favourite fantasy show, your favourite books rebound, or a full-on treasure chest, all you have to do is get in touch and I'll let you know how I can help.