A China report:

Tetenal kits are readily available in China. They are more expensive than in the US (around US$100). In Beijing, you might find it at the Wukesong camera mall, or possibly find a box at Wande photo. They are readily available online through the local buy anything site www.taobao.com (type Tetenal in the search box). In Shanghai, the big photo mall (I forgot the name) has it.

I've not found any other kits in this country. There may be a Chinese knock-off, but I've not yet identified it. (There is for everything else...)