ADS5463EVM: Suggestion on 1GHz/500MHz external clock module for 500 MHz system synchronous design.

I am planning to use Xilinx ZC706 with TI based ADC and DAC EVM boards ADS5463EVM and DAC3152EVM for my design. I want my system to be clock synchronous (synchronized clock for ADC, DAC and FPGA board). 

Can you guys suggest an external clock module/device which can give me 4 to 5 different 1 GHz/ 500 MHz clock outputs for the system? 

Thank you,

VK