is your question about placement or fabrication? each setup is different, so no one will be able to tell you exactly where to place your hangers. as far as fabrication, a simple "bucket" is all thats needed. You can fabricate your own out of plate or square tubing, which is pretty simple, or many 4x4 vendors will sell you weld on versions premade if you'd rather not make your own. 2.5" wide leaf springs are pretty much the standard, so these are all over the place in jeep, toyota, chevy, etc vendors. here's an example from allpro:
http://www.allprooffroad.com/images/stories/suspension/rear_hanger_l.jpg

-Rob