Good used guides. Various types available.
The Rover V8 Plug Lead Separators Guides 3.5, 3.9, and 4.2 are ideal for assembling and repairing electrical systems in vehicles.
Rover V8 Plug Lead Separators Guides 3.5 3.9 4.2
LAND ROVER DISCOVERY 1 3.5 3.9 ROVER V8 IGNITION LEAD SET RED RTC6551
V8 Ignition / Plug Lead Markers Labels Clip On Fits Rover V8
Land Rover Discovery 2 / Range Rover P38 V8 Spark Plug Lead Set NGC103740/810RED
Lucas Land Rover V8 Ignition Spark Plug HT Lead Set RTC6551G