SPCR

I have 2 PowerColor HD7870 Myst Edition cards and when I try to crossfire them the temps go into the upper 80's/lower 90's. Does anyone know which aftermarket coolers would work for this card? I think the card is Tahiti. I have emailed several VGA cooler company's and gotten crappy responses. I know the incredibly big Accelero Extreme 7970 would fit and work, but it's sooo big. I have a Fractal Design Define XL R2, so I have the room, but using 2 3 slot cards would overwhelm my Sabertooth 990FX motherboard, using amd fx8350. Any ideas would be appreciated.