Vostro 1510 Last Row Keyboard Problem

I have a total of 3 Vostro 1510 that had problems with the last row that is shifted when I type the Z shows X, Type the X shows a C.  The problem is describe on the following link

http://www.maximumpc.com/forums/viewtopic.php?f=36&t=141757

http://www.google.com/url?sa=t&rct=j&q=vostro%201510%20keyboard%20issues&source=web&cd=2&cad=rja&ved=0CDkQFjAB&url=http%3A%2F%2Fen.community.dell.com%2Fsupport-forums%2Flaptop%2Ff%2F3518%2Fp%2F19244634%2F19383141.aspx&ei=qyTzUObbFsHw0gHh7IB4&usg=AFQjCNETYGTBcBwmhsxnbwsQ9LXMb3QF5g&bvm=bv.1357700187,d.dmg

I read that I need a special Keyboard from Dell.  Does anyone has that infomation?

Thanks in advance

Patrick