can you buy this panel?

[jmaster78]

hi all, I removed the kick plate and discovered a whole mash of rust, rot, and dodgy patching, i have already purchased a new sill and boxing panel, but it looks like i need a boxing panel extension, the bit under the sill, the bit between the sill and floor, and the main bit the boxing panel is welded to. any idea the names of these parts? cheers

[Alex'n'Ane]

Is it the one i replaced? or the one next to it with the funny triangular pointy shape at the front?
http://www.mmoc.org.uk/viewtopic.php?f=5&t=39256
Yes they're both available.