i have a few sets of king 3/4" misalignments. ill measure the spread on em and if they are what you need you can have em, if not just get some bigger ones and turn them down, no strength will be lost. thats what i did. they are just a low grade stainless steel with no heat treat.
I believe desolate has a beam mount that will work. They come with a 1/2 hole but I believe they just open them up to 5/8 on their 3.0 builds. I have them and I’m pretty sure there’s enough meat there to do so. I believe the end has a 3/4 radius. That would leave you 7/16 of material around the bolt.