Glue or Attach a Gel style wrist rest to keyboard extension

Bit of an out there question

So my gf has a keyboard currently that has a wrist rest before the keyboard she likes.

Shes moving to a white keyboard becayse she now has a white build, white mouse, etc. But the keyboard she got doesnt have a soft wrist rest. Its just a bit of plastic.

What would be the easiest way to attach in some way some soft gel type rest on it?

It attached by magnets at the top so I dont want to wrap the whole thing in a type of leather or some similar material. If someone has done something similar, that would be handy to know what others have done.

Thanks

Is the need to attach a wrist rest to the keyboard a critical requirement? I use a separate rest in front of my keyboard and it works great, my mouse pad has a wrist rest that I like too.

Purely for aesthetic reasons. So the keyboard looks like this.

I think it would just look nicer. But if there isnt then Ill go with a separate piece and she will have to live with that