Retrieve weight of Amazon product via web scaper

Using a PHP function, we'd like to get the weight of an item on Amazon (using the ASIN we supply), with the correct unit. For example, passing the ASIN "B00IMH5BGQ" to the function should return something like: array( 'weight' => 5.6, 'unit' => 'lbs ); We use Laravel, so you're free to use any included Laravel functions or Composer packages. We are using the Amazon Product data API, however the API does not give the units of the weight, so we need to scrape it from the Amazon site itself.