The '49 Desoto convertible is one model I do not have but wish I did. I consider it my holy grail. I have been looking for one for a couple of years, however, they seem to be beyond my maximum price point. Also, the blue one that you have shown us is my favourite color on this model. Congrats John.
Here's my contribution to your thread - a '49 DeSoto 4-door sedan in white metal by "Alloy Forms":
Is there any connection between Alloy Forms and Motor City items? These sedans are showing up on Ebay at not outrageous prices but no convertibles, even doing an advanced search for completed listings. Must be very rare.