uc_feeds

Can someone please write me a cron hook for Drupal 7 Ubercart 3 to update uc_stock?
I'm using feeds and uc_feeds to import product data. All I need is to update the existing product stock field.
I've included uc_feeds for D7 and the uc_feeds-6.x-1.x that uses the stock update. The stock update is not written in the D7 version. After many, many attempts, I just can't write it myself.

Thanks,

Katie

Here's uc_feeds-7.x:
<?php

/**
* Implementation of hook_feeds_processor_targets_alter().
*/