netmeg - 4:07 pm on Sep 18, 2012 (gmt 0)
Google Analytics has never done that, by design. They have always insisted on no user-specific information in Analytics. You'd have to run your log files through an analyzer (or use a text editor that can handle big files and has a good quick search) to get that information.
Also, if you have ecommerce tracking enabled in GA, you can get that info on a regular basis - I have a set of three filters that I use that will actually display the order number next to the source and medium for each sale.
(However, if you are using Paypal or any payment gateway that takes them off your site to complete the transaction, it either won't work or would take a lot more programming, as far as I know)