I briefly searched and didn't find any details, but there are clearly 8 OCuLink ports on this (plus the usual SAS,) and Intel backplanes are generally pretty easy to use with other generic hardware.
Only 3 in stock.
Intel 8-Bay PCIe SAS/SATA Backplane Board P/N: H88386-251 Tested Working | eBay
Item is in good working condition unless otherwise stated. Any parts not photographed WILL NOT be included. We understand if you encounter any setbacks.
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Only 3 in stock.