Some collectors spend years pursuing a specific TV model, so you're in good company. I'll repeat my advice to post a free "wanted" ad in the ETF website. Who knows, another collector might run across what you need.
Did you know that you can search all of the craigslist sites at once? Go to
http://www.google.com/ and search for this phrase, for example:
old admiral tv site:craigslist.org
Many of those sets will be far away, of course, but you never know.
Use a variety of search terms, since sellers don't always use obvious words or pick a good category. One of my best craigslist TV finds was listed in a dumb category like Household with a nondescript title like "Old Wooden Set."
Phil Nelson