WP e-Commerce Catalog Visibility and Email Inquiry transform WP e-Commerce into an online brochure with Product Email Inquiry button and pop-up form.
Install and activate the plugin
Go to wp-admin dashboard > WPEC Catalog & Email Inquiry Lite menu
Rules & Roles menu to set product page rule > Hid Add to Cart.
Email Inquiry menu to set product page rule > Show Email Inquiry Button and config the email.