Are the Jazzmaster and Jaguar bodies the same?
Get a Gator case, that what I went for to store my Squier VMJM.
I use a Mono Vertigo gig bag for my jazzmaster. It's pretty awesome to be honest. I've also got a cheap gig bag for my Jazz bass that fits the Jazzmaster just fine (albeit with some extra room over the headstock).
Rondo music used to sell jazzmasterish guitars. Maybe you can pick up a cheap(er) hard case from them. (Edit - yep . . . this looks like what you want: https://www.rondomusic.com/Douglas_EGC-200_BAR_Tweed.html )