You can try WindowBlinds click here but bear in mind, you'll may see a slight performance drop depending on your system. There are a couple of good skins there, but there's always the potential of a conflict with something.
And, in addition, you'll need to get ObjectBar too (from the same site) to get the full XP look on some skins.
In the long run, if you really want the XP look, get it (after first checking to see if your PC is ready) for XP. Just my opinion.