I have a boot leak.. (tell me something new you ask)

After taking advice from the thread above I looked inside my boot from the rear passenger compartment. I noticed that the boot seal does not touch the boot lid due to an apparent curve in the body work out of radius to the boot.
Looking at the picture below (boot seal removed), the area in between the arrows touches the boot lid, the remainer has about a 3/8" or 8mm gap.
The area that touches, when the seal is in place and the boot closed prevents the rest of the seal that side from creating a seal.
[frame]
Do you think I'd be better trying a non standard type seal or try/attempt to planish the offending curve away from the lid?
For example from the following link
http://www.sealsdirect.co.uk/shopping.a ... tmentId=68
The seal I have in mind is the one labelled:
ETS59
the one I have fitted is the standard one labelled
ATMM1946