Refine the import module from the .xls for the store on Opencart 2.3

It is necessary to modify the module for importing the price list from the .xls for the store on Opencart 2.3.0.2.2
The current one finds matches on the article and changes prices, I would like to see when importing goods whose articles are not found in the price list turned off and the prices for the found articles are updated.

Ideally, when importing, I would like to see a checkbox with import settings following the example of a screenshot