The crossfire bridge should have come with the graphics cards... but let me look at your board. ok Since Crossfire support will be the same across the board.... Which slots did you plan to run your Crossfire setup,. I my self would space it out to cut temps since far as bandwidth and performance is gonna be the same across the lanes.
I would put it:
2.PCI-Express x16 2.0
your board seems to have the necessary spacing for your graphics cards...Check your boxes for your GPU's they should have come with crossfire cables. If not. any SLI cable online will do. You can actually bend in the cable and still connect it to the cards if the cable is too big.