http://apple.clickandbuild.com/cnb/shop/ftdichip?productID=102&op=catalogue-product_info-null&prodCategoryID=91 http://apple.clickandbuild.com/cnb/shop/ftdichip

http://apple.clickandbuild.com/cnb/shop/ftdichip?productID=102&op=catalogue-product_info-null&prodCategoryID=91 http://apple.clickandbuild.com/cnb/shop/ftdichip?productID=1... If you're willing to just breadboard it, or want to integrate it into something else, an FTDI chip + Maxim 1308x is basically what they're selling you, and I don't think they cost half that.