Scottl,
Regular parts store said that Cordon SP? used to be a good parts rebuilder but has become terrible after being acquired by another company. The plunger had incredible scoring on the 17mm OD and general soot like dirt clinging too it that was not consistent with a 30 mile drive to return the core and pulley installation tools. My regular independent parts store dropped them as a supplier and has no one to supply Jeep rebuilt pumps today.
The box the pump came in and the installation guide had no mention of the rebuilder's name. I asked the rather helpful tech the company name and sure enough it was the same as the independents store's old supplier.
Long story short I am rather sure the swarf was from the rebuilt unit. As mentioned another counter person said it was my fault for not installing the filter they forgot to recommend and did not even have in stock. If the swarf originated in the pump itself a filter would not have caught debris that originated from the pump as it would only catch debris that made it through the steering gear box and was on its way back to the tank.