Um. I have a MBA with an i7 processor.
As it happens, my particular model is a CTO (13" 512 SSD, 8 GB RAM), which I ordered late last summer. It is a superb machine, and I am very happy with it.
However, for what it is worth, earlier today, while checking out refurbs for a colleague who is interested buying a MBA similar to mine for her husband, I noted that the refurb site most certainly has 2013 MBAs with an i7 processor.
To be honest, I am not quite certain where the difficulty lies in trying to locate a MBA with an i7 processor.