Hi, there seems no tour that start from Hangzhou to Suzhou and Zhouzhuang, the transport between Hangzhou and Suzhou is very convenient, you can take the bullet train to Suzhou and then join the Suzhou Zhouzhuang Tour(https://www.travelchinaguide.com/package/suzhoutour5.htm) , you can also check the China Tours(https://www.travelchinaguide.com/tour/default.htm) for your reference.

I know that this web offers tailor-made tours. Maybe you can contact them to see if they can arrange one which from Hangzhou to Suzhou and Zhouzhuang.