power steering pump - damaged? Q45 94 year

[B52]

Welcome.
My Q has not ridden about six months.
I started the engine and left the garage.
The next day, I see that the car is an oil slick.
Oil cap flew overhead from the reservoir of support.
He poured oil.
After about one month's time I started the car and began awful noise below a reservoir of support.
Again, if the oil support weighed heavily and began to pump noise especially when turning the wheel.
Help, if we can rebuild the pump?
Thank you