Springer top clamp spec

I recycled this post from one of my first posts because I have received this question again. What top clamp fits which brand springers? The common repop inline clamp will fit paughco, v-twin, dna and original hd springers, they have the same spacing and hole dia. Note this dose not include narrow springers and inline is not the same as offset. And I also recently learned that oem I-beams are a bit different.