Craig,
What a neat thing it would be to buy a decommissioned Gurkha SN1! So, by all means, do ask Lalit. While I'm very partial to my new SN1, it would be a real treat to have such a piece of history. They might not meet your criteria in the "different" dep't, but the novelty sure could make them appealing. Who knows what the Brits would have to say about it.
Now for the question(s): What are the prices of the Gurkha books on the GH webpage? Are they paperback or hardcover?
'Tis almost the season, y'know....Dan