Would you be okay with socks that aren't an exact match to the original outfit? These aren't the same colors, but they are bright and striped.
The pastel version: http://www.sockdreams.com/_shop/pages/socks_detail_ProductID_733.php
If you find some socks you like, you could buy extra and then fold them to get smaller stripes for the trim.
Good luck with the outfit, I've always really liked Paradise Kiss' style..