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Amazon the stuff I've linked to is picobello; different brand but just as good. If you have a hunt around Amazon you should be able to find smaller kits with all the stuff you need. Don't worry about the colour matching too much with solid colours you can mix the individual sticks where the repair is needed using the heating thing. Also if you really mess it up you can scrape it off and start again.
EDIT, This is a useful guide as to how to use it for repairs:
Hiya. I would like to grab some wax pls.
How can I do this?