Fender Squier Strat Affinity series nut replacement?

I have searched high and low for a nut to fit my guitar, both in Guitar Center and Daddy's Junky music. Neither store has been able to give me a fitting nut; I have also searched online but I don't know if the size may be correct. ( I also do not want to pay in guitar center, to have my nut made from a blank because it's extremely expensive) Can anyone help me?