I bought a Pushrod kit for my Longer Lk1 300mm 3D printer: https://www.aliexpress.com/item/1005002571417570.html?spm=a2g0o.order_list.order_list_main.84.5aa01802T6FiI1

Since the frame of my printer is not a standard V slot extrusion, I could not use the standard mounting brackets that it came with, I adapted this sturdy/strong top mounts to allow me to connect the push rod while still giving me enough gantry clearance to not lose Z max movement.

You can use this with any 3D printer and tighten it to the frame top of the extrusion (20x20) using “T-Nuts”, this will give you a sturdy top mount assembly point for the push rod kit.