The same thing happened to me on a road trip. I was hundreds of miles from home, so I had no choice but to have it towed to an indy outside of Richmond. He got a new pump from the local stealership and installed it for me. The total bill came to $800.
the new pump itself was $400.
I like the lowered look the tie down chains give it, but otherwise, Its not a good look for a Porsche.