General Motors in November of 1957 passed an edict that stated company policy. That was to make as many parts interchange and restrict the number of part numbers. This means that trim ring was used on every car GM produced. It might appear on a Buick Glove box or the rear seat console in a Cadillac limo, or on a Pontiac console; but it was used over and over again (note the years that lock applies to). This means you have to expand your search, or find a grizzeled grey haired old parts guy that memorized the GM parts catalog decades ago, and doesn't use a computer to find a part on the shelf.
Unfortunately trim items are not listed in Hollander Interchange catalogs, but if you find a bunch of old OEM, NDP, or Year One catalogs scarf them up as they list application and years of the parts they used to sell back when NOS parts still existed.