Is there any way I can purchase another ROG FPS-II card that came with the ROG Strix Z790-i motherboard?
I accidentally damaged mines and one of the sata connectors came off.
I am hoping there is a way to get one of these cards as a spare part.
I imagine they are available within Asus somewhere - have you tried contacting customer support directly? Hopefully they can locate one for you...
I believe you can also buy SATA sockets for DIY electronics projects. Maybe you know somebody that might be able to attempt a repair as those cards don't appear to be too complex. Might be a backup plan.