I don‘t know anything about those Indo guitars (like scale lenght) - as there have been multiple versions of Jagmasters (with either scale lenght, 24“ and 25,5“) - do you already have the indio?
Or is this going to be a partsmaster project with neck and body sourced individually?
If partsmaster you might also consider
Guitarfetish offers those 25,5“ Jagmaster type bodies (US spec even but no upper cavity and in general less cavity).
Depending a bit on your budget…bodies with the bridge (and cavity) routing you want are out there from time to time - or can be made by some builders…
Alternatives to the mods: you could also always be
locking/decking a Strat Trem making it a hardtail without having to worry for getting another bridge.
And if you just love the Jaguar aesthetic and controls - and just don’t want a vibrato out of (tuning-) safety reasons: you might as well buy one (Squier) and put on a hardtail plate on:
(But even tightening (or removing) the spring should do the trick!)
In case you don‘t like the behind the bridge aesthetic - there are also Tun-o-matic Jaguar models out there (Contemporary) - and even some (I think Jazzmaster models) with the Toronado Bridge (and a Strat jack).
But I don‘t want to talk you out of your idea(s) - go for it if you feel like it this is what you want!
But sometimes you just don’t see the easy route (with no routing involved in this case) because your idea started with the Jagmaster and not with the Jaguar.
