Do you know about "Hometownfavorites.com"? It's an online grocery that sells hard-to-find products. Some of the things you remember might be available there. They don't sell substitutes or taste-alikes. They only sell products that are currently being made, though not sold everywhere. Bosco is one of them.
One of my favorite hard-to-finds is Heinz Sweet Gherkins. I've put in a request with Hometown Favorites to stock them. BTW: Hometown Favorites has a list of discontinued products, and one for renamed products. One favorite of mine was Kraft "Old English" cheese slices. Kraft still makes it under a new name, "Deli Select Sharp Cheddar". Miss the "Old English" name, but the cheese is as good as ever.
Two discontinuted favorites: Hydrox cookies and Nabisco Mystic Mint. Just learned today that Keebler brought out Hydrox original recipe last year for a limited time. I DIDN'T KNOW ANYTHING ABOUT IT, AND I'M DEVASTATED! :)
Nabisco Mystic Mints were like big Girl Scout cookies--the Thin Mints. FFV (Fine Foods of Virginia) also made a similar cookie.
Remember Sealtest ice ceam?
Pepperidge Farm made a wonderful whole wheat bread in the '60's called "Hovis". I visited the PF factory in Norwalk CT back then and Mrs. Rudkin still owned it. She met us at the door wearing a lovely corsage. After the tour we were each given a loaf of warm Hovis bread. There was something special about it, and it was delicious! We ate it for years until it was discontinued. At one time they even made Hovis sugar cookies. The Pepperidge Farm factory no longer gives tours, but if you drive down Hill's Lane you can smell the break baking--heaven!