I don't have one, but I'd be very surprised if you actually needed a case spreader to do your work. I've done lots of lockers and R&P jobs on lots of axles and I've never had to use one - of course that doesn't mean you wont, but...
Nothing fancy about the Salisbury that I'm aware of that'd require different tools - they're just Dana 60s with a Rover pricetag, right?