Strap buttons and locks are universal between the different Stratocaster models and other Fender guitar products.
Mexican Output Jacks
Cost: $3 to $6
Standard strap buttons are a simple way to keep your guitar supported. These are the same on Mexican and American models.
American Strap Locks
Cost: $10 to $20
The top piece of a strap lock bolts on to the strap and latches onto the knob. This keeps the guitar strap from sliding off.