What kind of peanut butter mix are you looking for? Peanut butter and what?
I love peanut butter and use it all the time in several choco mixes, such as Peanut Butter Cup, Butterfinger, and Creamy Peanut Butter. What did you have in mind? I'm sure we can whip something up for you. Since peanut butter goes so well with chocolate, that's what I primarily use it for, but its a great flavor and relatively easy to work with. Here's a couple of finished recipes for you to review:
Butterfinger
Caramel - 8%
Peanut Butter - 6%
Cotton Candy - 2%
Double Chocolate - 1.5%
Milk Chocolate - 1.5%
Vanilla Swirl - 1%
Sweetener - 1%
Peanut Butter Cup
Dark double Chocolate - 2%
Milk Chocolate - 4%
Peanut Butter - 4%
Caramel - 4%
Sweet Cream - 2%
Vanilla Swirl - 2%
Sweetener - 2%
Peanut Butter Cookie
FA Cookie - 10%
Peanut Butter - 5%
Cotton Candy - 4%
Vanilla Swirl - 3%
Bavarian Cream - 2%
Peanut Butter Surprise
Peanut Butter - 8%
Caramel - 5%
Double Chocolate - 3%
Milk Chocolate - 3%
Marshmallow - 3%
Sweetener - 2%
Creamy Peanut Butter Crunch
Peanut Butter - 8%
Hazelnut Praline/Pecan - 4%
Cotton Candy - 4%
Bavarian Cream - 4%
Vanilla Custard - 4%
Graham Cracker - 3%
Sweetener - 2%
Hopefully, this will get you started. Best of luck in your DIY adventure!