WTB: A ****pped copy of Windows XP that came with a Compaq D510

I have several Compaq D510 machines and a copy of Windows XP which I was 
told came with the D510's which doesn't seem to be the case because if I 
install Windows XP from scratch and use the COA from the Windows XP
sticker 
on any of the machines XP says the key is not valid. So I am looking for a

copy of the original CD that ****pped with these machines so I can properly

install XP on the machines I have.

Thanks
Andrew