Fixed price for product customization in prestashop

[neviomaria]

Hello, I am looking for a module to insert a fixed price for the customization of a product in prestashop. The price of the product customization must be independent from the product quantity added in the cart.
For example:
I have a product that costs $15.
Customization of this product costs $75
So the cost of a custom product is $ 90 (15 + 75)
If instead you want to customize 10 pieces the price will be 15 x 10 + 75 = $ 225
If instead you want to customize 100 pieces the price will be 15 x 100 + 75 = $ 1575
The price of customization is independent of quantity, is fixed.
I searched if there are modules that do this but I couldn't find them.
Thanks