There are "Acerbis" knock offs on Taobao for roughly 80 RMB + 30 RMB for extensions.

Unfortunately, it's a total crapshoot which kind of mounting hardware you will get. I have purchased several sets, and there are 3 different kinds of mounting hardware. I have no idea which mounts work on a JH600.

These handguards are great, and you can add the extended shields for cold weather. I'm using them on my Galaxy and QingQi after trying a half dozen different models I purchased at the Guangzhou motorcycle market. I also see they have another kind for the JH600 without the aluminum support.

Cheers!
ChinaV