heres a question for you ...
£612 does seem like a lot of money, so as these are Ford items do the relevant lights dim when you use the left or right direction indicator in the same way that all Audi's do?
The Audi ones only dim because they're so close to the indicators (in the same Headlight unit). Can't remember if its a legal requirement for DRLs or just a recommendation, but if the DRL and other light sources are more than a couple of inches apart, dimming isn't an issue.
You may now all shout "NERD".