If you need the tiny bits then a combined set is the way to go (set as poster above said)
Places that usually stock these are electronic shops. Communica/electronics123
Bought this set a while ago, still going strong. I do see their price went up quite a lot, paid under R100 for mine.
http://www.electronics123.co.za/Main.asp?D={D1C684B7-85C3-4CF8-9024-E6A96583D1CA}&PageType=Product&CategoryID=1931&SKU=VO213++++++++++