I found two diaphragm pumps in the junkyard, but both were too stuck to get off the donor cars. I settled for a piston pump instead. The install went pretty well until I tried to tighten the power steering pump back up. The belt made contact with the vacuum pump. I tried rotating the vacuum pump and messing with the power steering pump's position, but neither got rid of the contact issue. I removed the belt and am now driving around without power steering until the replacement diaphragm I ordered shows up.

I now have power brakes, shutoff using the key, and no oil leak.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.