Ncsewer I like the way you have phrased it. And I think we can improve it a little bit still:
Originally Posted by ncsewer
Although we would like to send the entire order to keep the shipping costs down, sometimes that is not possible. Your order of 3 yards of xxx is not in stock, please let us know how you would like us to handle this order.
1: send what we have now and backorder the rest, however, please understand there will be additional shipping charges.
There will also be room in the package for an additional five yards should you need more fabric by then.
How's that?