Hi Towed, here is a link to the Harrington website for GTB2 long nose bumpers. Further research may also be done on various car Club websites.
The bumpers are 'hand beaten' which gives a certain patina to the reflective surface. There is a little 'twist' along the rear cross section, which should disappear when they are tightened in place. The aim is to make the car look properly 'dressed'
http://www.groupharrington.com/en/pa...2-bumpers.html