Slider door locking mechanism and handle

Hello!
the locking mechanism (in picture) on our slider no longer works; the hook will no longer descend. The lock/unlock arm on the actual handle also broke. I bought a replacement handle only that includes this piece and the locking mechanism still will not descend. I would like to purchase the internal component to replace what I have and a new handle (preference would not to have the keyed lock on the outside).
there are no markings that I can see to identify the parts.
thank you for your help.