If anybody has the new Guitar Hero: On Tour game for the DS here is a Warriors grip skin:
You will need to insert it onto a word document,print it out then cut the actual thing out. The only problem is it takes a little while to get the right size to fit.
If you want a different skin, this is a good website for them (use the same process as above):
http://www.marchofthepigs.net/galleries/index.php
P.S: The colours underneath the button holes are the wrong way round. (Just thought you should know that) And if you don't know how to take the old skin out, there is an instruction manual that comes with it that tells you how to do it.
Hope you all like this skin or find a great one that suits you better!