Looks very similar to many of the Stonehenge fabrics by Northcott. Try a google and shop around. I bet you find it.

Look at keepsake quilting. It may be Tonga treats batik.

Royal Jewel Batiks at Keepsake Quilting

OK, I found it, but it's only for wholesalers ... http://www.wilmingtonprints.com/1013-51000-664

Any ideas on how I the non-wholesaler can buy it?

She said it's not a batik. If it was, I'd say try Batiks Plus for Hoffman. Hope you can get a better pic because it looks familiar but can't be sure from pic.

Success! I found it on Missouri quilts - it's out of stock, but I called them, and they are getting more in May! Yeah - thanks so much for all your help!

This may be it at Missouri Star. https://www.missouriquiltco.com/shop...-wide-backing-

Glad you found it!

I just got an email today from Thousands of Bolts and they are stocking the whole rainbow of Wilmington prints for $6.98 a yard.

How much do you need? This one has the same name (It's called Embellishment-Purple from Wilmington Prints)
https://www.sew-motion.com/shop/Prints/p/Embellishment-Purple-x29197667.htm