Loads a custom ticket selector template. The original is at /event-espresso/modules/ticket-selector/templates/standard_ticket_selector.php

event_espresso_load_custom_ticket_selector.php

/**
 * Add a custom ticket selector
 */
add_filter ('FHEE__EE_Ticket_Selector__display_ticket_selector__template_path', 'tip_custom_ticket_selector_template_location');

function tip_custom_ticket_selector_template_location(){
	return get_stylesheet_directory() . '/tip_ticket_selector.template.php';
}