I had the same problem, but ended up buying the entire 8 seasons from amazon.co.uk.
Then I discovered that all (as far as I can tell) Philips DVD players can be set to REGION FREE by following these steps:
1. Press Setup on your remote
2. Scroll to 'Preference' using the left/right arrow key
3. Press 138931 and a popup screen will appear
4. Use the arrow key and select '0'(you are now Region Free).
I hope that helps.
For great fan-written fictions based on the Helen and Nikki storyline, check out www.BadGirlsRiot.com