Replace seat adjustment fastening on Perception Acadia 12.5

Just bought an old Acadia 12.5, in good shape except the fastener for the seat adjustment strap is totally rusted out. Haven’t checked with Perception yet to see if they have the part - but anyone know if it is available, or have a hack for this? I have photos but can’t seem to upload them here.
Just a small metal part on the right inside cockpit, near top. thanks!