Adding Bluetooth 4.0 for Continuity/Handoff

Well, if the latest news is accurate, only Macs with Bluetooth 4.0 will be able to take advantage of Continuity/Handoff between iOS 8 and Yosemite. That means my mid-2010 MBP won't be able to take advantage of the feature.

Is there a USB Bluetooth 4.0 adapter that I can use, and will it integrate with the system adequately so as to allow these features to work on my machine?