I saw the Landmaster many years ago (early 90s?) in southern California. It was parked in a scrap yard/car lot alongside one of the freeways.
Given all the other famous vehicles which regularly tour on the car show circuit, I'm surprised no one has bought and restored it.
ObTrav: Across 11,000 worlds there's got to be scads of 57th Century versions of the Bovington Tank Museum, Commemorative Air Force, Old Rhinbeck Aerodrome, HMS Rose, and others.
Edit: D'oh! Should have followed that Wiki link before posting!