I think you're absolutely right, equill. It seems reasonable that they'd expect their techs to replace these as coupled units. I'm sure they weren't thinking of poor retrotech enthusiasts who find themselves suddenly in desperate need of a replacement part, like patrickool93.
For anyone needing to put an old yoke on a new crt, feel free to PM me for instructions on how to do it safely. It's not hard, but you do need to know a few things.