Product review (3 stars): "kit" is just a piece of plastic
The kit is a molded piece of plastic used to fill the hole left when the door handle is moved to the other side. It includes the instructions for how to do it. I suppose it's needed, you can't use the old one and still get the same fit of the door to the window since the original piece would be flipped 180 degrees and leaving it off would leave a hole that could trap lint or even snag clothes.

It took me about 20-25 minutes to do it be myself. All you need is a phillips screwdriver, a torx screwdriver and a soft place like a blanket or bed to rest the door on.

I think a double digit price for a piece of plastic and instructions is a bit much, but I guess having the door open the right direction and not having to reach around it anymore is worth it.