Easiest route, and maybe cheapest too, would be to build yourself one with a bolt-on neck
Warmoth, for example, has Strat-style necks available off the shelf that are 1¾" wide at the nut. That's considerably wider than the usual Strat neck. Same vendor also offers another off-the-shelf option that they call a
Superwide which is 1 7/8" at the nut
If you stick to plain maple for the neck proper and either a plain maple or rosewood fingerboard, you can bring the total price for the
neck only (no tuners or guitar body etc.) down to under $200 including shipping
Of course, you still need to source a body plus pickups, hardware, etc. but with a bit of wheeling and dealing even that can be done relatively cheaply. Just buy a guitar with a Strat-sized neck pocket, that has everything you are looking for besides the neck width, and swap necks for the custom piece. OTOH you could always build up what you wanted from scratch for about the same (or less) money as a new MIA Fender
Something like a LP style guitar that has a set-in neck would be a Much more expensive proposition, no matter how you go about it. Essentially, you'd have to have a Very skilled luthier make up the neck from scratch. BIG $$$ there.......