These are still basically a thing, but published on the web. If I remember correctly, at one point (decades ago) they came as newsprint inserts into Scouting magazine and yoo got either the Cub Scout ones or the Boy Scout ones depending on your primary registration.
The web site is https://troopleader.org/ and you probably also want to take a look at https://www.programresources.org/.
If you look under "Program Features" on Troop Leader, you'll see what you're looking for, a resource for planning a series of weekly activities based on a theme leading up to a "main event," which is generally either a weekend day program or a weekend (overnight) program.
For example, if you look at the Cooking Program Feature there's a main page, a section of helpful information (at the bottom of that page is a link to additional resources/references), a page with ideas and plans for the month's meetings, and then finally a page with three different "Main Event" ideas at different levels of complexity. Of course, you're not just supposed to follow these to the letter, but to use them (with the Patrol Leader's Council) to plan meetings and events that fit your program's needs.
Edited to add: This page has a video and information discussing how they work.