What an interesting and different cultural perspective...

I'm supposing you are in South Korea (can't see this getting through the state firewall somehow...) but this:

In here Korea, 90% of female clothes are brown, grey(pigeon color, rat color), black
made me think of the North...

I'm surprised you don't have the same flexibility in tailoring in Korea - but I can support Nikki's comments about Hong Kong, or Taipei if that's easier to get to - plenty of custom tailors who are willing to do anything for anyone... :D

Good luck with your search...

Katey x