So you mean the inner skin surrounding the hole for fuel filler neck?? If so as far I'm aware you will need to fabricate them as there is no off the shelf replacement panel available.
Also advisable to remove central locking pump (if fitted), drop out fuel tank (empty tank can be full of vapour which is even more dangerous) Dropping out suspension and removing rear seat, c-pillar carpet etc
What I'm saying is it's not a 5min job to do properly.
Have fire extinguisher handy and someone who knows how to use it. Oh, and be sure to protect your windows from sparks.
Don't ask me how I came by this invaluable advice
