Hi! I love to follow the oshare kei fashion and visual kei fashions too!
it's really difficult to find places that sell the right kind of clothes, but I do recommend (although quite expensive) SEXPOT ReVeNGe which is really great for it!
Another thing I love to do is just go down regular high street stores and find something with potential and it's quite easy to rustle up and outfit from a few regular items. Accessories is also a must for Oshare Kei; you can find a whole load of accessories to use from regular shops because the style of Oshare Kei is so diverse.
I hope this helps a bit
I'll add you as a friend so if you want to know more I'm more than willing to share some more tips!