Not sure which is best, but this should be a good starting point:
http://www.ft86speedfactory.com/susp...l-arms-98.html
...and more specifically:
http://www.ft86speedfactory.com/whit...2013-ft86.html
Not sure if you'd be able to find local, the guys here would probably simply end up ordering from FT86 anyway and then add a fat markup on the goods.
Pyro in Cape Town is a Whiteline agent so have a chat with Julian just to compare.