Where are you at
dwsmartins ? The cheap-o hubs are probably the wrong direction for you. Get something of quality. I would talk with your local wheel builder and see what they recommend. I would personally look at the White Industries MI5 but you make it seem like you are in a place that is hard to get decent parts. They may be more expensive but can be had in 36 and 40h and are really reliable hubs. I have a set of their T11s and haven't done anything to those wheels they just roll perfect every time and they are rim brakes so I would know if there is an issue and while not as heavy as you am not a light weight rider by any means.
Oh wait I see Brazil, I should have read more but you might see if Tassara bike in Chile could help out?
World Wide Distributors ? White Industries They also make some nice titanium frames from the look of it so probably could also help out with wheel building which as a Clyde I am sure you are well aware of.