Historically the shafts that end up with spline issues happen from being too short so after the ones likely to be able to be removed without moving the TC.
That said the prop shaft is hollow and is not a big deal to cut with any form of metal cutting solution.
Recently when I couldn't get my bandsaw into a tight space I used a tubing cutter to cut a galvanized water pipe in half and even that would probably work (not to mention make the cleanest cut ever). I think the 2-piece guys offer a core return price to convert into the two piece kits.
Harbor fright sells angle grinders stupid cheap. I just cut the hub off an old brake rotor in under ten minutes It would take less than a minute to cut a prop shaft in half.
