Are you sure they are not welded Thyalcine? I thought they were but this would not be the first time I was wrong
Good wheel builder you might want to check out businesscycles I had a wheelset built by them for my one bike it has been great. He has a some suggested builds on his web site, but you can call him up and discuss other options. As for 36 hole how about some Suzue ProMax NJS Hubs now if just more options for NJS rims