I need some help with my shipping problem. Let me explain. My client wants to sell art work from different artist. He wants to be able to set the shipping up in the "Add Products" so that he can set the zip code from where that art is being shipped from using UPS SBW only. Lets say that someone from zip code 77777 wants to sell a painting, and someone from zip code 55555 purchases it. The shipping would be calculated from zip code 77777 to zip code 55555 instead of my clients zip code for that painting. My client would have an option field (or something like that) where he could put that artist's zip code in when adding the art to the products page. This would be done for every product.
Can someone help me out with this? I am in the process of getting everything set up and have had no problems so far. I just have to get this solved to be finished with the store.

Store's URL
http://www.futurerenownedartist.com