This place in the USA sells them...new reproductions.
https://www.swedishcarparts.com/parts/1702-1364028-1364029-volvo-240-wagon-interior-door-post-c-pillar-cover-panel-beige-set-of-2
The RH side only 1364029 is available (new Genuine Volvo) from GCP.se cheaper than the above:
https://www.gcp.se/en/?s=1364029