Why would u wish to know when the water pump was last replaced it maybe never... a pump could last the life of the engine, there's only three issues you could have with a pump, which would require a replacement, leaking coolant via the shaft seal, a failed bearing or broken/detached impeller and any of the three you who'd know about.
As for a manufacture of pumps, as LR use a few suppliers for their parts I'd go for a pump that has original equipment manufacturer OEM in its description, not a pattern part.