How to build a free MarketPress store?

Hi, I'm trying to build a store with all contents 'free'. The store is behind the Membership+ firewall so is only accessible to staff and the intention is for staff to be able to order office equipment from the 'in-house' supplier.
I have gotten close to the desired results by making all products digital but the problem I have is they can only order a quantity of 1 if I go down this route.
If I make the items a 'normal' physical item the user needs to go through the checkout process and enter name, address etc. which is not desirable.
Does anyone have any suggestions on how to build this free store?
Thanks