Modifying Call For Price

[sublime19]

Update:

Thanks to TheOracle I have made progress.

This shows up under the price on product info

if (isset($button_check) && $button_check->fields['product_is_call'] == '1') { 
echo "<img src=\"https://www.acmelectronics.com/store/includes/templates/template_default/images/call_for_prices.jpg\"";
echo "<br><br>For a better price call<br>";
echo "<h4>1-877-233-0173</h4>"; 

Viewed on any Listen Products

I would like this to work where ever price shows up. Such as New Products, Linked products, etc.

Is there one location where I can add my code to show up if Call for price is enabled? We want this to show up under the price each time it is displayed if call for price is enabled.