A bunch of years ago the KiCost plugin was made. I used KiCad’s BOM and pulled pricing information from multiple sources and made a spreadsheet overview of options. I did not follow this project very closely, but as far as I understood all those shops do not like others making nice overviews of their portfolio and make it difficult for automated tools to get to their data. Apparently there are also paid options for such data but that also is a bit problematic to combine with Open Source software. I don’t know what the current state of KiCost is, but it is sprobably still interesting enough for you to have a closer look at it’s capabilities.