If you arent too far into the game, then you can get Anthony Vanden Borre for around that much, maybe a little less. I've managed to get him for 1M. But a few years, his price increases I think. He's good and VERY versatile. He can play CB as well if you need him too. AND he's plenty good. AND he's young!
Other than that, I think you might be able to get Justin Hoyte from Arsenal (I dont know for sure since I always play with Arsenal!) for under 2M. And he's pretty good as back-up. Has an average of 7 for me. Also can play LB if needed. Dont know what price he'll come for though. I know, as Arsenal, I used to get bids for under 2M from other teams which I always rejected.
Hope that helps.