don't know if you have done this already but are you for sure the surface is warped because I have never heard of a Grey with a warped surface
however, if you get the surface from Charles MacIntosh just call him and ask him to make sure you get the newest surface, he can make that happen if he has them in stock or has them drop shipped, he will know how to get the right one from Tornado, hes been doing big business with them for 30 years and no one knows more about tables than he does...he is vry helpful, honest, and competent
let us know how it goes, changing the surface is the most difficult thing to do on a table but if you ae kind of handy and follow instructions, it will be like new when you are done. You have a super good table in the Grey without "Product of Valley" because that means it is a Grey made after the the 30th anniversary table made only one year in 2003 if I remember right...but this means you have all merkel rods...cherish it, one of the best things Tornado has ever done - you may not know the difference and don't have a point of reference but trust me in that they are super good and are near impossible to bend
I would love to hear how it all goes and how your foosing goes after that...tell us something about yoruself, your history with foosball, and what you want from it going forward