Hi,
I don't know of any alternative extension.
However, it should be easy to do the same thing with a small view override as per
joomla.stackexchange.com/questions/21171...te-style-to-subpages
In your case, configure the listing template as the main template. Then, try adding such code at the beginning of the product / show view file for your main template via the menu Display>Views :
<?php
$app = JFactory::getApplication();
$params = array();
$app->setTemplate('xxx', $params);
?>
where xxx is to be replaced by the folder name of the template you want to use on your product details pages.
It should then switch to that template when accessing a product page.