In my experience, when things like this happen, if it's out of warranty, hit up eBay. Even if you find a cosmetically challenged pedal, you can always lift the internals and put in your existing case. Digital pedals generally have the boards thrown and replaced with new ones... it's all down to whether you are ripped on the replacement board and postage costs to see if it's worthwhile. And don't be surprised if the parts are being sourced from the States (Not had experience with Line 6 directly so they may keep a set of spares in the UK, or then again, they may just concentrate on retail).
Either way, good luck!