Hi,
Jeepers, you might be showing your age! 🥸

Yes the misalignment started or remained throughout the 240 years so I do not doubt it’s not your imagination about the alignment.
Replacement of sagging bushings helps the 240s.
Several people purchase aftermarket polyurethane bushings but it all should have been better from Volvo.

As far as rebuilding pumps that has been blown into the weeds by rebuilder competitions and recycling efforts.
Both these pumps are simplistic in design and operation. So I understand your questions of kits but those kits being provided to a limited population of persons who would do it anymore is the answer.

The power steering pump was probably made by Saginaw in Michigan.
Thirty years ago I showed films in my classes where one machine bored the housings at the rate of 600 an hour! Trust me, assembling is not all that far behind when needed. Normal is about 20% of that.
Most car manufacturers source their products from a world wide base.
The world is a global enterprise for absorption or consolidation as Continental Elite series bought the GoodYear GatorBack Quiet designed V belts.
The slanted rib made it quieter upon entry into and exiting a pulley.
They may be using the GoodYear rubber formulation in the poly series serpentines.
Gone from the market place now.
I cannot find them except in old stock today.
I’m still trying to follow that paper chain.

The only way you can repair them is to get yourself in between the part makers and the rebuilder as they the rebuilder did.
Unless you can substitute a common seal arrangement you have to make them yourself.
Same goes for the main bushing or the grooved plain bearing that fits the shaft of the power steering pump.
Water pump bearings go bad if ran too long with internal coolant leakage. Not noticing drips from the weep hole or noisy operation is the final death. They have rollers or balls and not repairable.

Save the core and stock up.

Phil