I have pages available as electronic downloads that can be printed on your choice of paper. Visit my online store at http://gumroad.com/ColoringGifts to see my current selection, which changes periodically. I sometimes add page bundles, seasonal pages, and pages from upcoming books I’m working on.
I have also added subscriptions to increase ease of access to electronic downloads. I’m using both Patreon (Patreon is a subscription service where you sign up to receive different rewards from artists) and my online store in Gumroad, both have the same coloring pages each month, but different ways to access them, with Patreon making them available in different tiers, and Gumroad allowing you to choose whichever genres you like most so you can subscribe to one, two, or more.