I think I have some numpad keys I am not using now that I can send you. The trick though is these keys age, and each set may have a slighting different shade. So, one trick I have was to use Round 1 or Round3 group buy sets' modifiers as Dolch moogle kits :-). I think those colors were close enough.
As for Windows and Menu, they are way different then the rest of the keys and fonts. Since they are just graphics, you can't really tell they are thicker or thinner than other keys. At least I can't. I don't think we need to redo the Windows key or the Menu key. Unless, you want to use the new Windows 8 logo for the Windows key! Hahahaha! There I go again!