Thank you so much for your response!
Unfortunatly, i havent been able to make it work, i know i need to change something here:
echo JText :: sprintf('MANUFACTURER_URL', '<a href="' . $this->element->product_url . '" target="_blank">' . $this->element->product_url . '</a>');
right now i just need to make the brand image appear, the link can stay, is ok.
I am not totally ignorant of php & html knowledges, but i have been trying and nothing i did seems to work, sometimes the whole page break
And my client is getting a little impatient 
Thank you so much in advance!