Drivers door... what is this bit called?

If I may use one of Busters Pics.... I have the offer of a good drivers door frame and skin.... no bits.
Problem I have is the 'back plate' that holds all workings in place on my door is shot. It is badly rusted and broken away just to the left of the black locking button. I need a replacement.
PLease see first pic on Busters link re door locks. I can see that it bolts on holding everything in place.
http://www.landyzone.co.uk/lz/f41/door-lock-renewal-79426.html
I have looked on Ian Notts parts list but couldn't spot it.
Can anyone tell me name of the complete plate that bolts onto the inside of the door and if poss a place to get one? Many thanks

landranger services will prob have one in atherton, only 10 mins up the road. don't know what it's called though.
or try buckley bros up darwin. they will have one tucked away somewhere and you may get a bit of discount if ya go up there and haggle

Ah hope this works..

landrover defender 90/110 door winders on eBay (end time 21-Feb-10 23:10:59 GMT) not that far from us.could allways collect for yers if yer win,then yer can sort a courier out to get them to yers.

Buster.... I now know its called an inner panel... thanks for that
Thanks for that Gegs..... good to know, see what develops
Oil Dripper.... Thank you for the offer. I may take you up on that. I have to go to Bristol in the next couple of weeks so would be passing you. See what develops, many thanks.
It a bugger when you don't know what the real name for a part is... all the searching in the world dont help! Thanks again gents