I got these. They works fine and are a lot less than the two you linked:

BEC NeTech PCIe PCI Express Riser Adapter Card with USB 3.0 Extension Cable and SATA Power Cable (6 Pack) (VER008C) https://smile.amazon.com/dp/B089RT4NY1/ref=cm_sw_r_cp_api_glt_fabc_ZZWPY46D1SDHV65NGS6E?_encoding=UTF8&psc=1