Welcome back on land.
My seats came from PACE in Qld. They were supplied as bare aluminium 'buckets' and are ADR/registration compliant. Bare headrests (now padded and upholstered) were included.
I had the seats upholstered by local marine upholsterer. He did a nice job; comfortable too
Here they are....(headrests not shown in this pic)
Cheers!
Glen