Who are Derby?
It's quite unusual to get the roll hoop kits split for parts, I do have a black carcass from a roll hoop kit.
To be honest you'd be better off getting a full kit like here....
As photos, small blue mark on lid can fit for you in Woking, Surrey collection from Woking too. £275 on collection Full kit with all fixings question via email
zroadster.org
Or drilling holes in your storage lid and turret cover to make them fit. Chrome hoops (unless they are AC Schnitzer) are only for show, not roll over protection.
Hope that helps.