Rather try to find a intact one if I can Dave, the old one is 2 1/2 inch diameter and sits right in the middle of the lower playfield, so anything other than dead flat will have a disasterous effect on gameplay.
Also, after my Gorgar plastic straightening efforts, (saved by Daniel, thanks mate!) Mrs 48 has enforced a no-go zone for me around her oven! I am banned from the kitchen, except for making her a coffee in the morning!
Cheers,