So how many ports? LOL
You can look at the SuperMicro PCI 8-port SATA controller, that is without RAID.
But you can just as well use a (fake) RAID controller and create one-disk arrays, or if you use linux/bsd you will not see the fake RAID but just the disks.
Note that PCI is a shared-access bus, meaning performance could be an issue, especially on servers where lots of I/O take place, the interrupt usage for PCI is also higher.