Copy attachment when creating Quote from Opportunity

[Xsandor]

Hi.
We are receiving purchase orders from customers as a single PDF attached to an email. At the moment these are configured to create leads/opportunities in Odoo 16.

When we create a quote/sales order from the opportunity it would help a lot if the attached PDF from the opportunity was copied or references somehow in the quote/sales order, so we can look at it in the preview while adding all the products.

I haven't found a module that does this, or any forum threads that discuss this feature.

Anyone here who has done something similar or even knows an OCA module that could help out with this?