The Xilinx ATX cable part number 2600304 is manufactured by Sourcegate Technologies and is equivalent to the Sourcegate Technologies part number AZCBL-WH-11009.
Sourcegate only manufactures the latest revision, which is currently A4. To order, contact Aries Ang, aries.ang@sourcegate.net, +65 6483 2878 for price and availability. This is a custom cable and cannot be ordered from the Sourcegate website.