Using view result as an input filter for another view
Say, the term reference field in the product content type is called "field_ref_producer". You need to have this block of code, and a view that accepts a contextual filter for "term reference producer ID" ready.Let this view be called "other_products_producer"

$node = menu_get_object();
$output = '';
if(is_object($node)) {
  $producer_id = $node-&gt;field_ref_producer['und'][0]['tid'];
  $output = views_embed_view('other_products_producer', 'default',$producer_id);
}
echo $output;


Basic idea is, grab the node object from URL, get the producer tid from it and then embed a view passing the producer nid as contextual filter to the view. 

Update:

Code to put in views PHP (default value of contextual filter):

$node = menu_get_object();
if(is_object($node)) {
  $producer_id = $node-&gt;field_ref_producer['und'][0]['tid'];
  return $producer_id;
}


Please replace the name of the field to what you have in  your content type.