Well it seems a few people were interested so here goes. Attached are some pictures of the product that I've found that fits without cutting, its colour matched, its waterproof (made of silicon), and looks as if it came with the top box.
I secured it with a strip of aluminium in the middle of the wrist pad with 4 small stainless bolts through to the lid of the top box. I doesn't stick very well being made of silicon so came up with this idea for fixing it.
The product can be obtained from the internet at a very reasonable price from many suppliers worldwide. The wife said it feels very comfortable and works well with her armour in the jacket she wears.
Anyway, you can see for yourself in the pics attached - any comments gratefully received - any taking the PPPPP, then keep it to yourself.
You can't blame a man for trying !!!!