Hey there,
I'm sorry to say that we do not sell an exact replacement for your existing Pella locking handle. Your Pella casement window locking handle resembles the 38-275 Pella Casement Lock Handle. The left handed side is part 38-274. This handle is used with the 38-284 Pella Casement Strike. However, as you'll notice, they are extremely different in style. That said, I am not confident that these would work as a suitable replacement.
Unfortunately, we do not have any replacement that could work for the latch hook installed above the lock handle.
I believe your best bet would be to reach out to Pella directly. They may be able to supply you with the replacements you need or guide you in the right direction to obtain them.
Our sincerest apologies that we could not be of help with your repairs but please feel free to reach out with any other hardware repair projects you might have!