It would have been so much more helpful If I knew the song this costume is in. <a href="http://www.cosplayfu.com/comics/Vocaloid/Rin+Kagamine#419" rel="nofollow">http://www.cosplayfu.com/comics/Vocaloid...</a> This website has one of the largest selections of cosplay (especially vocaloid) that I've seen and they don't have it but it is very easy to have them make it for you. I had them make a Canada costume for me last year. You just need that picture to give them

eBay sells a ton of those! Or try a cosplay group on Facebook for your country/state. I'm part of one, that's in the Netherlands, and it's a really easy way to find cool clothes via Facebook groups because these groups are selectional; goth, lolita or in this case cosplay. So if you're looking for something you'll easily get some good tips in such a group! Good luck!