Joomla 2.5 and VirtueMart2 to get the link of the product with its id

Joomla 2.5 and VirtueMart2 to get the link of the product with its id
The actual job title, need php code which will build a link to the product card on an existing id or sku of the product ( still), the code should work in the file index.php themes. Theme jblank.