Thanks for the reply Jerry.
I was told by our vendor and Cisco that the WS-X6748-SFP card from the 6509 would transfer to the Nexus 7K. Making it compatible with the Nexus.
I use this card on the 6509 to handle all my fiber connection back from our access switches throughout the building.
I could not find a compatibility matrix backing up the vendor or Cisco's claim; hence why I am posting here..... I currently have another module (same type) connecting 4 x 1GB fiber trunks to a Nexus 5548.