Creating a Feeds Plugin Child from a custom module and calling the new method
I have the issue fixed however this may not be the best method.  If you know what is then please let me know. 

You can set a Plugin with 'setPlugin'

$this-&gt;importer-&gt;setPlugin('PreviewFeedsParser');


This wipes the config though.  So the following code shows - getting the config, setting the plugin and readding the config.

$this-&gt;importer-&gt;setPlugin('PreviewFeedsParser');
$this-&gt;importer-&gt;parser-&gt;setConfig($config);
$result = $this-&gt;importer-&gt;parser-&gt;parse($this, $result);