Not true…WooCommerce is far superior than WPEC. You can simply make a product external. You should see this setting in your product backend. From there, you will have a URL field to enter where it will redirect to when clicked.
I agree that WooCommerce is suprerior. It’s just that the external link is visible only in single product view, I need it for catalog view, but I can’t figure out what lines of code I need to copy-paste. In WPEC this part was very simple (only one line, ~20 characters).