PN,
IIR the Wittering Shephard's are on display in the appropriately named Victor and Valiant Conference rooms in the Ops/Eng HQ Building. Not sure if it's just RN but there should be a Silver Store which you can ring up and loan silver for mess functions. Not sure where it is but as mentioned previously a lot of the stuff from Stafford is now at Donnington.
As an aside was at Bentley Priory last weekend and the place has history oozing from it. Such a shame that the RAF sees fit to flog it.