Ive got a pair 420mm.. Im in london nw3 . Do you need postage?
I can do them for £12 plus postage.
Pics
420 is centre to centre
They look totally straight/unbent to me. Most ive seen have a bit of bend. Anyway, i checked (3rd pic) and it is about 5mm out. Not that you would notice on the bike.
The middle section is clean. I took it out very carefully.