If the big factor for you is sugar vs corn syrup, Pepsi has you covered year-round for some products with "Pepsi Throwback" and "Mountain Dew Throwback" though

If the big factor for you is sugar vs corn syrup, Pepsi has you covered year-round for some products with "Pepsi Throwback" and "Mountain Dew Throwback" though they may have changed the branding. The 12-can cases of them will have either a script-style logo or a retro design. On a more seasonal basis I believe both Coke and Pepsi do "kosher for Passover" versions with cane sugar that may be available in your area.