So you can't buy the DVDs?
Well if you really want to see the show again, and your unable to buy the DVDs at this point there are plenty of ways to see them, Ripped from the foreign DVDs, and ready to be viewed in XVID (.avi) Format, just like anything else you'd ever want on the internet.
http://btjunkie.org is a bit torrent search engine that if you go ahead and put in The Invisible Man your sure to bring up season 1 and 2, both with decent seeds, and it shouldn't take more than 2 or 3 days of leaving your computer on all night to get each season.
EDIT: I should also mention the season 1 that comes up first is marked under GAMES, but don't worry, It's the Episodes, just get it.