Why don't you just get your teeth whitened. Conne? Far less than £1200 and, although your front fillings would not be exactly the same shade of white as the rest of the teeth, it would still take away any discoloration.
It's not painful and you wouldn't need to be "knocked out". I had four 20 minute back-to-back sessions in one go and, although they felt a little sensitive afterwards, the results were well worth it!
You'll also get a syringe full of the whitening treatment, which you keep in the fridge and can then top-up your treatment whenever you want.
Ask your dentist about this, or see if there are any beauty therapists in your area that offer this treatment. Make sure they're reputable though, and licensed to do it!