Update, hopefully the final one.

Went ahead and purchased a new receptacle housing Volvo p/n 9494800. (Note: through research in various parts suppliers found that Volvo p/n 9456341 is the same part).

And,

Purchased the correct terminal extraction tool; I found this "Rennsteig" tool on Amazon, about $37. Key words when searching for the correct tool: "for Junior Power Timer connectors." See equivalent part numbers on the plastic tool storage box.

The new Volvo receptacle housing was installed on Cylinder #3, and the terminal extraction tool is exactly what's required to pull the four wires from the old housing and insert them into the new housing.

From looking at the old receptacle housing, the top plastic clamp had lost its tension and apparently allowed the housing to move inside the ignition coil port, causing arcing and wear on the contact blades. The blades were burned and damaged; and the coil no longer would fire. Replacement coil and the new receptacle housing has fixed the #3 misfire, hopefully for good. Included below are a few pics.