Who is DaveB? Is he ITK for parts?
The pads have a warning anyway don't they so as you say, it may be worth waiting on the pads dropping a bit more and getting a fresh set then?
I have just went out and had a look and the edges are corroded and there is maybe a 1-2mm lip......
With a discount code I can get a pair of 312mm Pagid discs with Pagid pads for £107 at Europarts.