Hey, I've done 2 sora cosplays (as well as the one I just gave up on due to money and so forth) so far, so I think I can help ya here.
Do NOT buy the LITB one. That site is horrible and a scam site. The jereth, while being good, isn't needed on price. They also sell a wig called Jaguar. I've used it for both (and was gonna redo for this latest one) and this was the result:
Obviously not the BEST styling ever, but you can see it still is plenty good enough.
Oh and get warm light brown color.
Or get a punky wig (don't know the best place to get those anymore though) in a light brown
I can't tell you too much on the shoes..I used her tutorial too and altered it for what I had already. I used dress shoes for my Limit Drive Form cosplay, so I used different colors, but I didn't find the same clown shoes she has, so I went to party city and got red ones. I had to make covers for the right color. This is my result so far:
Obviously again, not finished but you can see that they aren't bad at all. I just used vinyl rather then the foam/fabric combo.
For the Kingdom Key? If you want, you can PM me for a tutorial on mine:
Necklace you can see in the pic. I used cardboard and layered crown cutouts to make the charm..The chain is a white plastic chain I painted with silver spray paint. I put 2 "pin backs" (when you get a pin it's the thing like a safty pin in the back of it) and glued them on the back, that way when I want to put on and take off the necklace all I have to do is open the pin and it comes right off.
For the chain I'm guessing now that you are talking about kh1. If this is true, I have to take back the wig color above..I don't know for sure if this is the version you want so..If you want KH1, the wig color would be a slightly darker brown, like spanish brown for that wig..Anyway onto the chain. You can make this out of anything really. I would make it out of clay. Get silver sculpy and make a ton of little crown shaped and put holes in the tops and bottoms of them so you can put circle links in there (these would be just like you would see on a necklace that holds the clasp onto the chain). Then also attach it to the belt. By micky head, do you mean the one on the keyblade chain? Because that's where that is, not on the belt chain..You can make one like mine out of cardboard layers. then that white chain I mentioned above, you can cut one in half so you hace a U shape then stick it in between layers of cardboard when you are glueing it.
Anything else I would be glad to help you with. And if for any reason you can't do any of this yourself, I am a commissioner. I am also selling my keyblade and limit form cosplay (this means the necklace too, which I can sell alone) if needed.