I am certainly not saying that the Dragons are not perhaps the most important or collectible KF. It is in the top 5 for sure and any position in that list is subjective.
I was thinking about the convertibles of which only about 150 were made?
The Virginian and Frazer Hardtop - 935. Dragons - 1277. Darrins - 435?
I don't think low budget entry cars with low production should count toward the "rare and desirable". Owning a KF from this era - all are collectible and interesting - but the above numbers for what most of us believe to be the most collectible prestige cars of KF is actual.
Could they have made even more Dragons? 1953 was a lull year, strong production from the majors but not yet the price war era of 1954. Korean War was still going on, but was in the managed stage, not stressing the economy and supply chain as much as 51-52. ALL of the manufacturers, major or (now) orphans came out with special cars, signifying optimism toward the future.
Hudson - Packard - Buick, Cadillac - Oldsmobile, the Dragon, etc. I am sure there is a record indicating demand, non demand for Dragons that would tell the story of whether they could make more.
From reading the historical books on KF, Last Onslaught and Built to Better the Best - I always got the impression that the Kaisers gave up on cars by March or April 1953 anyway.