I can confirm that a Diyeeni 8 port SATA card bought for $50 CAD on Amazon last week works fine. The Diyeeni name likely means nothing, and the specs of the card seem pretty generic but here they are:
Item Type:PCI-E to SATA 3.0 Card
Model:PCE8SAT-M01
Master: Fit for Marvell 88SE92xx+JMB5XX
Interface: PCI-E 1X 2X 4X 8X 16X
Support System:Fit For Windows 7/8/XP/10 Fit For Ubuntu
Expansion Interface: 8 x SATA3.0 Interfaces
Compliant with Serial ATA 3.0 specification, backward compatible with SATA2.0 SATA1.0; PCI-Express v2.0 compliant, backward compatible with PCI-Express v1.0.
Supports speeds of 6.0 Gbps, 3.0 Gbps and 1.5 Gbps; supports Gen 1i, Gen 1x, Gen 2i, Gen 2m, Gen 2x, and Gen 3i.
Supports AHCI1.0 mode and IDE mode, native command queue (NCQ), FIS based on port multiplier switch or command switching and hot plug.
Compatible with SATA6G, 3G and 1.5G hard drives.
User with SATA3.0 data cable for best results.
The card came with a CD or DVD for firmware, but I have not used it and HexOS is currently operating smoothly with the card.
Cheers, E.