Hi,
So do you want to change the link of the "Call for Price" link to a specific link? If so, then you can do this by editing the PHP file that controls the price-layout
open this PHP file:
/templates/YOUR_TEMPLATE/html/com_virturmeart/sublayouts/prices.php
find this line:
$askquestion_url = JRoute::_('index.php?option=com_virtuemart&view=productdetails&task=askquestion&virtuemart_product_id=' . $product->virtuemart_product_id . '&virtuemart_category_id=' . $product->virtuemart_category_id . '&tmpl=component', FALSE);
replace it wiht this (insert your own link in it):
$askquestion_url = "http://www.yourdomain.com/yourCustomLink";
then you will be good to go.
Regards.