Leanne Graeff's Etsy store features lovely designs digitally printed in bright colours and illustrating such things as tractors, tee pees and the house-next-door, as well as the caravans shown here. While she does sell them pre-printed on a variety of objects, from totes to baby t-shirts, she also just sells the printed cotton fabrics, allowing you to use them in projects of your own.
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This design sells in fat quarters (suggesting quilting as one possible use for the material) for $9 or you can get a full yard for $36.
See her designs online