I'm Ron Trickett (the Ro/ckett in Rockett Graphics), an artist from Silver Spring, MD. My son, Ed, is my partner in the biz and does work under the name Headrubble.
Other sites that carry my/my son's work include:
Signed Art Prints are available on Etsy (if you ask): https://www.etsy.com/shop/rockettgraphics
Some of my original paintings are also for sale on Etsy: https://www.etsy.com/shop/RonTrickettArt
Threadless carries some of my designs: https://rockettgraphics.threadless.com/designs
You can see my daughter's beautiful dressage stock ties at https://www.etsy.com/shop/BadHabitStockTies
If you have any questions, comments or requests, or if you'd prefer a piece with a different color scheme, scale or orientation, feel free to contact me at firstname.lastname@example.org. I also accept commissions.