Degsy The foil may have been put there to compensate for wear in the shells, by supporting them closer to the crank. Another trick from the early days of motoring when spares were expensive, pockets empty, needs must. Foil is sophisticated, more usual find is a slice of beer can.
The big end eyes can be re-machined easily. This is established automotive practice, and will successfully recover all but the worst of abused rods.
Don't condemn the oilpump just yet. As long as the body is not cracked, bloated or scored, they can be coaxed back to life. There is a knack to assembling them, lots of hints already posted. They all bind to a degree, the skill comes in finding where the obstruction or tight spot is. If its seized, a good warm up with the heat gun can free off the parts enough to be dismantled and cleaned. Keep the gears in the same relative positions if you can.
Swarfy.