I love Retro Ads, especially those with recipes. Here's a Retro Ad from Welch's for Chocolate Covered Coconut Bars. Mounds Bars are made by Hersheys, but it's close enough. The recipe on the Ad is for Chocolate Covered Cocoanut Bars with the final line on the recipe:
"But why go to all this work when no one makes cocoanut bars better than Welch!"
So if you're inclined to make your own, here's the recipe!