I posted somewhere else on this forum, (and I have NO affiliation) with him.
But he does sell military grade servos. (he started his business for large scale air planes, etc.)
But I would look (seriously, at some of them.)
I have about a half dozen, and price/performance I have found NO better ones.
His shop is in Florida (not sure where you are, but he ships what it cost him).
Link to a great one - and my next (well another one of his servos)
https://www.promodeler.com/DS2685BLHV
Note that is the ALL out one, but you could easily get by with even the much cheaper ones. (just make sure the cyclic rate, and deadband -
is what you need).