Have a look over at Ford Courier Collector
http://www.phpbber.com/phpbb/index.php?mforum=fcc there is heaps of stuff for Couriers ,also have a look at the posts in the Mazda Forum.I thought about changing mine,it will come down to what offset you want to run and that will dictate what disc to use,if your use a hat type disc and just get a hub machined up to suit!!!!!