sdk8 searching for parts

G'day fellas. This is just a follow up to my first post in case someone with a contact may have missed it. Hoping that anyone out there is able to shed some light, i am trying to find parts, second hand or even a new one. It's the skid steer drive pump which the teeth are broken and operates the right side back, forth and turning operation. i don't know what it is called as i am not a mechanic. Getting anxious as and i cannot find another.

sdk8 searching for parts