I must say, WSP is a very good example for silicone soap mold from China.
It seems that they have a good quality control in China.
The trade off is higher cost and it is worth
For FDA silicone, well, in China for some cases , if you ask for Mars FDA certificate, they can do it for you.
In case of you are shortage of any kind of material which from China, buy it ASAP. Price will be going up very soon.
Their domestic demand shall be bigger than outside.
In this moment, it is 100% good chance selling good quality US soap, to China.