The top handle is called Nitze Stinger. There are two versions (a short and a longer one). I have the longer one. But I also had the shorter one and its also great.

The link in amazon is: https://www.amazon.com/Nitze-Stinger-Handle-Camera-Built/dp/B08CN6T3WJ

And here is a link for the smallrig camera mount (a link for the german amazon website):

https://www.amazon.de/dp/B07F8VW1RP/ref=cm_sw_r_cp_api_glc_i_D94YYG8W2WBH6RWY863J