Rebuilding the ABS Brake Pump?

Wondering if anyone has any experience or know of any companies that refurbish the ABS hydraulic Brake pump. I'm in the Detroit area and trying to get my stuck pump mechanism unstuck but not having the best success. These units are factory pressed together so taking it apart isnt exactly an option. Would love to find someone who rebuilds these things but doubtful its that easy.

Any help would be appreciated.

 

Thanks for the info. The alfo pump would probably work, but is not identical. The closest thing I have found is the Jaguar xj pumps, they are identical housings and motor, the only difference being the accumulator is in the spot the brake line bolts up to on the ferrari unit so it sticks up and would be unable to install the closeout paneling. I was however able to use the electric motor off it and its a plug and play application. Last night I took an extra little keyway that plugs into the pumps shaft and welded a long bolt onto it so I could attach my drill to the pump. I had been soaking the pump housing in my parts washer, and then blew it out, rinsed some lacquer thinner through it, and then let thinner sit in it while I spun the piss out of it until my drill battery died. Its the most free its been and fingers crossed should work again. We'll see!