Great shop. But they do charge $80/hr for their work.

oil pump - replace whole unit if needed

any vacuum pump can fail.... its just a matter of maintenance. They can usually be inspected for play / wear. If any signs are the slightest bit unusual, replace it.

injection pumps cost $200 just to test. I think most of us should do it, but can not justify the cost.... its ok to cut this corner if the engine runs well.