Removing freebody

Recently acquired a new set of wheels and they're completely unbranded, no logos anywhere whatsoever.
Opened the hub to clean and regrease and discovered that it's loose ball and in order to remove the freebody, I'm guessing I need the 4 pin tool (see picture). Provided I'm right, what tool is it and where can I get one? Or even better, is there an alternative way of getting the freebody off without having to buy a useless, one time use tool?

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Its hard to see on your picture but maybe it is like this:

where you need a 11mm (?) allen key to remove the freehub unit

http://www.parktool.com/blog/repair-help/freehub-service

Yes. Like that, I would think. The four tooth thing is what is keeping the freehub ball bearings and pawls together. The deeper pointy out of focus bits (in your picture) that look like the back of an inverted stegosaurus is where force needs to be applied to remove the freehub from the hub. Probably.

I considered that it may be 11mm but wanted to check before I went out and bought one. I'll take it to a bike shop and see what they think as well.

Thanks guys

My mavic cosmos hub has a similar arrangement. I got a tool made up from a bit of flat steel about 5mm wide, the correct length to fit into 2 of the slots, welded to a bolt so allowing me to use a socket and ratchet on the bolt head. It was a bit of a bodge but worked perfectly. The lock ring was fairly tight and was also left hand threaded. Can take a pic of the tool if needed.

Thanks dude but I've since given up on the hub after realising that it is in fact, 10 speed (I run 11speed). Thanks though