"Add a Site" custom button to WHMCS packages

Hi all, since im using WHMCS provisioning module i have turned off the registration of wordpress and from prosites, and with this functions turned off the "Add a Site" button is not going to show up anymore in "My Sites" page which is perfectly normal.
It would be great if there was another option to add a custom button or text link to send users to WHMCS subscription packages.