You will be lucky to find one. Besides, they are really not very practical. You will be better off just removing all PCIe slot covers and having good front and maybe a bottom intake fans. Leaving slots over instead of even vents slots improves airflow by about 70-85% and with good intake fans (and no opening not covered by fans in front fan mounting panel) no exhaust fans are needed because all the air intakes push into case has to leave the case for more air to fit in. Airflow is simple displacement. What flow in must flow out.
Phanteks Owners Club Ways to Better Cooling
i7 980 @ 3.55GHz =PH-TC14PE w/2x TY-143 fans =Crucial Ballistix 3x4GB =GA-X58A-UD5 =ASUS GTX580 DirectCU II =Enermax Modu84+ =Define R2 w/3x TY-140 case intake fans; all PWM controlled by CPU fan socketPhanteks Enthoo Primo MoBo Rampage III Extreme CPUi7 980X
@ 4.0GHz =R1 Ultimate
w/2x TY-143 fans =Dominator GT 6x2GB
=Rampage III Extreme
=ASUS GTX580 DirectCU II
=Enthoo Primo w/ custom castor base