I got a quote from FordPartsUk after an online enquiry, which was £69.64 plus £6.95 postage and which looked identical to mine in their photo, but the spec on their page wasn't actually for a B-Max. It showed other models such as C-Max and KA, but looking online those are very different. Still, maybe that's their error so I'm going by the photo if I decide to buy it.
There is an alternative one around online, by Hella, which is around £50 plus £8.45 postage, but I'm thinking that maybe it would be best to go for a new Ford part given that the price difference isn't that enormous.
B-Max Zetec Ecoboost
Deep Impact Blue
No-frills other than rear parking sensors...