I've bought both white and black guards from Fender. The white guard they sell, they say is from the Custom Shop models that use a white 5-hole 1-ply guard. It fit my Mex-Classic perfectly, without any buckling or bowing, as the factory guard did. I've also used the BlackGuard from Fender and I've had a custom guard made by Terrapin Guitars, who is a custom pickguard guy (
www.terrapinguitars.com) He also did a great job. The guys, here use the Callaham, which I hear is very good. Other than those three, I haven't used any others. THe white 5-hole 1-plys can be tough to find. Lots of shops do the black, but not the white. A Stew-Mac I tried
didn't line-up with my drilling, so I went with the Fender, and both black and white 1-plys fit very well.