Magento Pre Order – Pre Booking, Back Order Magento Extension
Magento Pre-Order is a complete back order solution that helps to sell "out of stock", "unavailable products" or "upcoming products" on your Magento store. Back order Magento extension is designed to be a dead-easy way to encourage customers to buy certain products that for a reason unavailable for immediate delivery - so as a Magento customer you are allowed to pre-book an upcoming product which will be shipped as soon as it's available.