Caravan Window Winders

I think you have to buy the whole unit! But there are a variety of different models and brands.

The handle simply pulls out of the box (get a screw driver under the edge), but the box is a chuck away item.
The box has a hidden screw attachment from the outside and you will need to drill out the pop rivet at the end of the arm..
Box and handle are sold separately.
Rubbish stuff.

Cheers,
Peter
OKA196 motorhome

I agree with the rubbish part of your comment.
Typical of the big con job Caravan suppliers of parts and caravan manufacturers, rip off the silly buggers that own caravans and cannot afford to get everything done by authorized repairers.
We have removed the old box and to get the handle out we had had to nearly destroy the box. Can't see how to get new handle into new box without dismantling the new box
Thank you for your advice
Pete M Qld

On mine the handles just push into whichever box/end you want the handle to be as most of the wiondows have two gearboxes, one on each end with shaft connecting them along the top, like you I found it nearly impossible to remove the handles once installed.
On a not unrelated note has anyone found the latches wearing so the windows don't close completely?

Step-by-Step Wind-Out Window Repair

That link may assist.