Hello, i can make what you are looking for but first i need to know what do you mean by " just need to fit the information that is going to be printed in the invoices.", i think that the information is out of place and we do not need to add more information.
I have experience with dolibarr, also know french (that is a big plus since dolibarr is from france).
I develop custom ERP's if you like to see my work we can agree a date to make a screen cast.