Do you have customers that order the same items again and again? My Order Copy module for Zen Cart makes it so easy – and it’s now updated for 1.5.5a. The My Account, Account History and Account History Information pages all offer them the ability to copy an entire order – even one containing products with attributes – to their cart for re-ordering. Here’s a screenshot of the My Account page:
You can buy Order Copy with or without installation; your preference.