Kim, while I don't have any experience with white figs personally (yet), I have ordered White King and Santa Cruz White from Jon, so I know he sells them as cuttings at least. Of course you can read about them here: Santa Cruz White and here: White King Have fun finding a white fig for your collection.
Edit:
Sorry, I did not read your post as carefully as I should have, I missed the white inside part, so disregard White King, as it is red inside. However, Santa Cruz White is very white inside.