Sorry, guess I wasn't a lot of help. Right now, Microsoft is the only mfg. who currently makes a bluetooth keyboard. Additionally, as far as wireless keyboards go (non-bluetooth but RF not IR), no one I've come across yet has a built-in mouse/trackpad/trackball/pointer. It seems to be external wireless mouse or nothing.
Incidentally, I'm confused. How can you build a mouse to a keyboard? Either you'd have to move the whole keyboard, or...? Aren't you looking for a keyboard with a trackball or eraser-joystick (like Toshiba/IBM laptops)? Regardless, good luck.