Ben, recommend that you forget about Summit for your leads.
Myself, Guy and David March each got a set of custom made (to length and spec), all-black 8mm ignition leads with the woven heat shields for around $200 the set from ICE. They were made the next day and the best part is they are local. They are in Bernard Street, Cheltenham. Great to deal with.
Innovative Ignition Systems & Components - ICE Ignition
Cheers,
Sime