I fitted my initial IRS panel with a telephone pad. Not really realistic but it was filling the hole! (top pic)
I was lucky to find on EBay a brand new base panel with the proper pad (bottom pic.)
http://i24.photobucket.com/albums/c2...NIKON001-1.jpg
I combined the Two. The keypad frame had to be enlarged though
The Keys have a very nice "pro" feel and are lighted.
http://i24.photobucket.com/albums/c2...NIKON003-1.jpg