Among the beers I used to drink but can't get now would be JW Dundee Honey Brown. It used to be everywhere but today nowhere. A beer I never had but have always wanted to try was Ballentine. My Dad drank it & when I was a kid & we would sing the Tag Line, "Make mine a Ballentine ". I make a Ballentine clone from Michal Steel. I'd love to see how it tasted compared to mine.
Along the same line, how about "Beers they don't make anymore & we should all be glad."
Jax (The beal jeer), Lone Star, Stroh, Schlitz & worst of all Old English 800 Malt Liquor.
Oddly enough there was a furniture polish of the same name which tasted about the same. In college it was $5 a case but if you bought 1 case the liquor store gave another for free. It was so bad that I couldn't give it away to college guys.