There are none. Why? Your multifunction will no longer multifunction. Why not? The market isn't big enough for such an addon. Why is that? It takes a lot of development to make such to work with a multifuntion and as such you should look at a multifunction that has wireless.

Here's one -> http://h10010.www1.hp.com/wwpc/pscmisc/vac/us/product_pdfs/391138.pdf

Bob