Volvo 850 PNP spacer

[goergerm]

Hi. While repairing a 1997 Volvo 850 non-turbo wagon with AT, I seem to have lost a spacer that sits under the PNP switch and has a hole for the mounting bolt furthest from the engine (i.e. toward the tire).

The shape is roughly outlined in the photo. The semi-circle part goes under and around the wire harness plug boot. Does anyone have ideas on how to replace it if I can't find it in a wrecking yard? The semi-circle part is probably not vital, I am more concerned with how thick a DIY spacer needs to be.