Checked Hobby Lobby - nothing that worked there. Went to a local archery shop and they can custom order a half dozen Easton X10 target arrow shafts for over a hundred bucks per 1/2 dozen.
I think the carbon fiber rod is the way to go, just need to source one that is close to .21mm OD so I can use them for both 22LR and .223. After about an hour of searching online this is all I can find. Not cheap but cheaper than the Easton arrow shaft. https://www.amazon.com/gp/offer-listing/B000BRLLAA
I like these because rather than hollow they are solid but they don't offer the right size. http://www.acpsales.com/OnlineStore.php?cat=5321
I think the carbon fiber rod is the way to go, just need to source one that is close to .21mm OD so I can use them for both 22LR and .223. After about an hour of searching online this is all I can find. Not cheap but cheaper than the Easton arrow shaft. https://www.amazon.com/gp/offer-listing/B000BRLLAA
I like these because rather than hollow they are solid but they don't offer the right size. http://www.acpsales.com/OnlineStore.php?cat=5321