Need Help Finding a 12 string nut

[joeperrylespaul]

Hi, I'm new here and think this site is great!

I am hoping you guys can help me out here. I am building a custom 12 string les paul. I have a neck build to the exact specs of an the 12 string neck on a epiphone double neck. The neck does not have a nut on it and I can not find one that is preslotted that matches the size anywhere. The length of the nut is 1-11/16". I am not very experienced and don't think I want to mess with slotting a blank nut. If anyone could please help me I would appreciate it. Thanks a bunch!