Pella Casement Window Crank, Cover and Lock Lever set

Hello,

I'm looking for an exact replacement of this right-hand crank set, but in a satin nickel finish rather than the brass color in the attached.

We bought a set from pella but its not an exact fit. I'm thinking they are selling for the current model casement window and ours is older?

On the back of the crank set, it says "77BH". Hoping that can help us get to the right part?

Any help is appreciated!

Alex