Hi Pete,
Is it a siamised set you want?
If so I would recommend Roger at Cake st classics,
His chromed pipes fit and are the original shapes, not like the alternatives
His contacts were on a similar thread a week or so ago.
I fitted a stainless set from Armours to my SR , it took a day at a friend's stainless fabrication shop to get them to fit correctly
Cutting and shutting , expanding the head ends and so on
John