I used to get my hoops from a Keller retailer few miles away from me in California. They would cut the size i wanted on the go and the price was very reasonable. ( $25 each for a 24" )
Unfortunately that place stopped reselling Keller shells. I recently bought a 24" 1969 Luddy BD and i realized the hoops were warped. I could conceivably try to repair them but ( By warped I mean they are not sitting flat on a table surface) it is hard to find the right size hoops with right thickness and width. ( most are 1.5 " wide) and they asking around $90 each.
anyone has a good source for maple hoops ?