MK1 Seat rails

[Dubstein]

Im in need of putting a drivers side bucket seat into my Golf but am unsure if i should just custom make myself some rails or just weld the seat to the chassis somehow (Car is for track only). By an chance would someone own or know of somewhere that sells them or if newer gen VW/VAG Cars fit mk1, with or without modification?

Also curious to know who makes steering wheels for a mk1 bosskit, I currently have a momo ready but the bore and pcd are completely different.

Help would be amazing, thanks!