Window hardware
Hello! Your operator appears to be a match for our 39-348, which is a Truth brand part. That's not to say that the window itself is Truth, but your operator certainly is.
This is designed to be used with the 36-078 shoe stud and 39-205 handle. I note that your old handle is a Pella brand part. I do not advise trying to reuse that. The 39-205 will work much better.
Also note that the cover cannot be removed in any way. It's permanently affixed to the base.
It is not, unfortunately. Like I mentioned, the cover is permanently affixed on the base and cannot be replaced with any other style, nor would another style fit over top of it. The only folding handle option available for this operator is the 39-205.
We do not sell this cover either, unfortunately. That's really more part of the frame than it is part of the operator. You will need to see if Pella can supply that to you directly.