Newegg.com - SAPPHIRE 100293DP Radeon HD 5570 1GB 128-bit DDR3 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Low Profile Ready Video Card w/ Eyefinity
That'll be about your best bet.
When it comes to SFF (Small Form Factor), it gets difficult to find a powerful gpu, especially something powerful enough to support 2 monitors with that resolution. This card will not be powerful enough to play games, or render anything at those resolutions. It ill let you do some of it, with limited abilities.
One monitor will have to be hooked up via HDMI, and the other DVI, but I have yet to see any different between the two at the same resolutions.