Simple Joomla 1.5 Plugin or Component

We need a simple Joomla plugin or component: We want to hide product price for guest who has not sent us contact info, guest will see "click for price" button that will links to a popup form to request to fill in all contact info, after guest send contact info,he can view all product info then. We don't want to use Joomla user login system to do this. Please check "www dot nimltdengineering dot com" and then click "Click here to view our PRICELIST" button to check what we needed.