i'm guessing you mean the square plate closing the end (nose) of the dumb iron, yes those are as standard landrover plates although my welds were probably linished back a bit more than the originals
inside the dumb iron there is a sort of W originally to guide and support the bumper bolts from compressing the chassis, as i had to open my dumb irons up for extensive repairs i just replaced that with a piece of box section between the bolts, this in my opinion reduces the risk of mud etc' getting trapped and rotting the front out again
here's a link to my p/bucket page showing my hacking and patching
My 1965 109 pictures by NiteMare_08 - Photobucket
edit..
if you do need to open the dumbirons up in the same way as i did, DO NOT forget to drill the drain hole in the bottom plate, i used a holesaw to cut my drain hole
second edit..
you'll need to jump to page six to see the state and repairs i did

