David -
It is possible to form a hose if absolutely necessary using straight hose and plastic elbows & joints (you'll need the correct diameter for it to fit properly on the pump and the valve), however I would try to reuse the original hose first or see if one your dad saved is the same. If not, one may possibly be located.
Get me your model number and I'll see if I can figure it out.
If the existing hose is still soft and not dried out, it ought to be able to have the valve debris removed. Since you have the clamp off, try to squeeze the hose from the outside to break up the metal parts. That should not rip the hose. Once you do that, you should be able to rub the rest of the stuck bits off, piece by piece. If the hose is too far gone, you'll need to splice one. I don't know the diameter, however hose supply houses have the WP diameters, and even Home Depot had some when I last looked.
Get me your model # and I'll see at least what the hose part number was/is.
Gordon
