The good news is that KJW parts are some of the easiest to get. Contact them directly by sending an email to:
sales@kjworks.com.tw
Give them your gun model and the part number/name and you will get the part you need in 2-3 weeks. Include everything needed for them to make an invoice in your email, including your shipping address. They only accept paypal as far as I know, so state in your initial email that you want to pay via paypal. It will make things much faster because with the 12h time lag, it sometimes takes over 48h to get an answer, and bouncing emails with that kind of delay can take a while.
Shipping is usually really cheap. Last time I ordered it was 2,50$ USD for a bunch of 1911A1, Glock and Hi-Capa parts.