Hi all,
Thanks so much for all the very helpful responses and suggestions. I just talked to Kalispel (
https://kalispelcaseline.net/custom-cases) and was able to order a custom case, 65x14x4.5" external, 64x13x4" internal, which should allow guns with barrels up to 47" depending on LOP. I have a 62" case of similar design that I bought from Cabelas years ago (no longer sold by them) and found that it's held up to many cross-country flights. Price they quoted me was around $725 plus tax and shipping.
I also talked to Barbie Chambers last week- who directed me to Americase, which made the cases that Chambers used to sell- Americase in turn no longer makes gun cases, but they directed me to Doug Hubbart who makes a similar case. Doug can be reached at 573-286-9905, and makes custom cases using a mix of metal and plastic. I didn't get a firm quote from him but sounds like a 65" case would be in the $500 dollar range; he does carpet lining, dividers, etc. This would probably be a very nice case but I went for the more expensive all-metal version from Kalispel because I've had good luck with that design in the past.
So to summarize: if you want a case longer than 62" that's good for airplane travel, the 3 options I've been able to find so far are the case from Crazy Crow (72", doesn't hold up well without additional reinforcement), a custom case from Kalispel, or a custom case from Doug Hubbart.
May make sense to move this to another part of the forum in case it's useful for other members looking for cases!
Thanks again all, I really appreciate the help. I'll try to post a picture of the Kalispel case when I get it.
Clint