Certain loom manufacturers are making frames for Carol's classes. You can order these frames yourself.
You won't find sprang frames on any of these websites .... the frame makers are not yet convinced there is much of a market .... your contact/inquiry could help encourage them to post the frames on the website ....
Dewberry Ridge makes Carol's frames, using a clever little tightening device.
Contact them at: dewberryridge.com
Purrington looms makes frames in a variety of woods, white wood, oak, walnut, and more.
Contact them at: purringtonlooms.com
Egill's Woodstuffs now makes Carol's frames.
Contact Chuck Jones through ETSY for a lovely wood frame.
When Carol was in New Zealand in 2016, frames were made for her South Island classes by Ashford
and by Majacraft on the North Island.