Hey gametight I have a slim as well (530s). I heard the same thing how they won't fit so I bought an external one at sewelldirect.com that seemed to work well but honestly I rarely used it. I have then switched back to just one monitor and tried to sell it at 2+2 to no avail: Want to Sell Sewell External Video Card - General Marketplace -- Two Plus Two Poker Forums

If interested I'd sell it really cheap.