Hi Cameron,
Try this place out, they had the best price and quality when i was looking
http://www.aerobolt.com.au/Products/Tools/Tools.shtml. The one I bought was MFX612 S it works like a ratchet, if your doing M6 - M12 this the tool you want, if your doing M4-M6 you can just use the rivet plier type. I have used this tool for about 3 years now without issue, the same tool from Wurth at the same time was about twice the price.
Steve