Sylius - Extend Product fixtures from CoreBundle - sylius

Question

I've extended the Product model from CoreBundle (v1.0.0-alpha) and I want to change the behavior of the fixtures based on this new model. Keeping in mind that CoreBundle\Fixture\Factory\ProductExampleFactory is final, I am looking for a way to extend the fixtures so I don't have to rewrite the whole class and the whole "default" suite.
AppBundle\Entity\Product
<?php
namespace AppBundle\Entity;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\ORM\Mapping as ORM;
use Sylius\Component\Core\Model\Product as BaseProduct;
/**
* Product
*
* #author leogout
*
* #ORM\Table(name="sylius_product")
* #ORM\Entity
*/
class Product extends BaseProduct
{
/**
* #var ArrayCollection
*
* #ORM\OneToMany(targetEntity="Package", mappedBy="component")
*/
protected $packages;
/**
* #var boolean
*
* #ORM\Column(type="boolean")
*/
protected $exposed;
/**
* #var ArrayCollection
*
* #ORM\OneToMany(targetEntity="Customization", mappedBy="product")
* #ORM\JoinColumn(name="customization_id", referencedColumnName="id")
*/
protected $customizations;
/**
* Product constructor.
*/
public function __construct()
{
parent::__construct();
$this->packages = new ArrayCollection();
$this->customizations = new ArrayCollection();
}
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set exposed
*
* #param boolean $exposed
* #return Product
*/
public function setExposed($exposed)
{
$this->exposed = $exposed;
return $this;
}
/**
* Get exposed
*
* #return boolean
*/
public function getExposed()
{
return $this->exposed;
}
/**
* Add packages
*
* #param Package $packages
* #return Product
*/
public function addPackage(Package $packages)
{
$this->packages[] = $packages;
return $this;
}
/**
* Remove packages
*
* #param Package $packages
*/
public function removePackage(Package $packages)
{
$this->packages->removeElement($packages);
}
/**
* Get packages
*
* #return ArrayCollection
*/
public function getPackages()
{
return $this->packages;
}
/**
* Add customizations
*
* #param Customization $customizations
* #return Product
*/
public function addCustomization(Customization $customizations)
{
$this->customizations[] = $customizations;
return $this;
}
/**
* Remove customizations
*
* #param Customization $customizations
*/
public function removeCustomization(Customization $customizations)
{
$this->customizations->removeElement($customizations);
}
/**
* Get customizations
*
* #return ArrayCollection
*/
public function getCustomizations()
{
return $this->customizations;
}
}
Thanks in advance !
EDIT :
After some digging, I saw that I needed to code a whole new fixture with a new ProductFixture, a new ProductExampleFactory and a new MyCustomProductFixture on top of that with their own config files which is not ideal... Do you have a better solution ?