Compared to the original ones on the left, they are way too high. But that was easily rectified with a pen knife and some sanding paper. The exact thickness was a bit of a guess but in the end the handles sit pretty nicely aligned with the surround.
For good measure I swapped the lock barrels left to right (assuming that the driver’s side was used much more then the right hand side).
With the door handles sorted I started on probably the biggest challenge of the restoration, rebuilding the heater unit. Main reason I pulled it apart was the fact that I wanted to get rid of the A/C bits, and the foam covering on the different flaps was in a rather bad shape. So I got myself an assortment of EDPM (closed-cell-foam) rubber from a local rubber company. And after all the bits were coated I started with refurbishing the flaps;