Besides Taco Bell, the following restaurants & snack shops (for lack of a better name) are currently selling DIY kits for making their products at home:
Auntie Anne’s Pretzels
They give you everything but the butter. You apparently make the pretzels from the beginning (the dough stage). You can make the original or cinnamon sugar kind. $20 each. Available online until supplies run out.
Dunkin (Donuts) and Baskin-Robbins
Dunkin’s selling large (9 donuts) & small donut (4 donuts) kits. They supply the donuts (which sound like they’re cake donuts); you get 3 choices of frosting & 3 choices of sprinkles to decorate the donuts with. The donut kits are available at select stores across the country. The small kit is $5.99; the large is $9.99.
The Baskin-Robbins sundae kits are mentioned after the Dunkin donut kits, in the same, linked, article about the donuts (Dunkin & Baskin-Robbins are owned by the same corporate parent).
As for the Baskin-Robbins sundae kits, you get 2 quarts of ice cream; 1 “wet” topping (like hot fudge or caramel sauce, etc.); 2 “dry” toppings (sprinkles, cookie dough, etc.); a full can of whipped cream & the cherries for the top. You also get 5 sundae cups, spoons & napkins. They’re $24.99, available at participating Baskin-Robbins locations nationwide for a limited time.