[Eliot Ness]

#5 is just several (5) caps in one long square metal can. It is shown on the second page of your link in figure 2 and contains the following caps:

.05 (use.047)
.09 (use .1)
.25 (use .22)
.75 (use 1)
.2 (use .22)

The typical yellow Chinese film capacitors rated at 630 volts will do fine, and Buzz has a Youtube video showing how he restuffed a similar capacitor block.

You need to observe where the different colored wires from that block go so you'll know how to wire it back up.

I think I'd replace that Sprague with a 10 uf capacitor just to be safe, or at least make sure what you test it with can measure leakage because that is a very old capacitor.