In case you were still looking, I just wanted to let you know I found a set on amazon that has the original soundtrack throughout the series. https://www.amazon.com/House-M-D-Complete-Hugh-Laurie/dp/B008P9M614

If you get it, make sure you select the third "2004" option because the blue ray and possibly newer dvds seem to have the end credits theme. Quality is obviously lower than the other sets but I think the trade-off is worth it. Also do you happen to know where you can stream/watch versions with the European intro? That's the only one I'm not sure where to find.