So I'm using the community version of Odoo 13.0 and I've been trying to modify the fields in a request for quotation to no avail. The issue is that a request for quotation has two columns that identify a product, labeled as Product and Description. Product field is always compiled as "[Product Internal Reference] Name" and the Description is "[Vendor Product Code] Vendor Product Name". If vendor product name is left empty in the price list, it is replaced by the product name in the Description field. So I'm trying to modify this so that I have three separate fields: one for the product name, one for the vendor product code, and one for the vendor product name. If vendor product name is empty, I would like the field to remain empty. I've been trying to find the function which generates these fields from product module, but I haven't been able to find them. Is there any way to modify the way these fields are calculated? If not, how can I access the vendor product code in the purchase module?

Any help is very much appreciated.