disc brake question

[rmmurphy]

I,m sure this has been addressed before, I can't find the answer I'm looking for. I want to put power brakes on my 68 c10. a friend fave me a set of spindles from a 85 burb. I need a set of 6 lug rotors that will fit these spindles. I remember an early 80,s model "heavy half" that was 6 lug. My local parts store guys look at me like I'm on drugs when I ask for heavy half parts. Are there any other factory rotors that will fit these spindles?

Thanks in advance