Thanks to a great suggestion from proeddie, I added an RV handle from eBay at the slider entrance. Overall it’s working well, but I decided to use M8 rivnuts, since I have lots of them.

This makes for a very solid handle, but the holes on the handle do not fit standard M8 screws. So my version is not as elegant, after I enlarged the holes.

not as elegant

There is also only one height where the specified handle lines up with the existing holes. There are other holes available, but you’ll only be able to use one of them with this handle without drilling.

Again I used my spiked bolts to mark where to drill holes in the B-pillar moulding. So much easier!

spiked bolts