Add Order Time to Custom Documents Module

I have the custom documents module, however when creating our own custom dispatch note, on the list of available tags that Mintsoft have provided, there is no tag for order time. You have order date but no order time. Because we have a specific cut off time on orders placed before 3pm customers will receive that order the next day (UK only) however all orders placed after 3pm the customer will only have their order picked and packed the following day, hence why it is beneficial for us as a business to have the order time on all dispatch notes.