The auto to manual hub swap isn't that serious a chore, especially if you've been into the hubs already and are somewhat familiar with the operation. The only real options for your truck are the Superwinch hubs already referred to ($125 at Independent4X.com ) or stock Aisin hubs either from a parts yard near you, or sometimes they show up on the For Sale forum here. I believe '87-'02 are the compatible years.

James