Looking for a PCI (not PCIe) card for (non-raid) SATA that is compatible with PowerMac G4

["Rick Thomas" <rick.thomas@pobox.com>]

I have an old PowerMac G4 "Silver" (PowerMac3,4 533 MHz) running Debian Jessie, that I'd like to put a couple of SATA disks into.  That means I need a SATA controller card that will fit in one of its PCI (not PCIe) slots.  It also needs to be to be compatible with the PowerMac Open Firmware BIOS.  I've tried two RAID SATA-ii cards but they expect to have a Windows PC BIOS motherboard and refuse to even allow the Mac to boot with them plugged in.

Anybody have a recommendation?  And where can I purchase it?

Thanks in advance!
Rick