I believe what you are actually getting is a new 9(a) Visitors Visa from the Philippine Embassy. That is NOT the same as an Extension which is only available from the Bureau of Immigration within the Philippines. You can apply for a Tourist ACR-I Card at any BI office. They cost $50 and are only valid for one year. You will need to show an exit/return ticket at the airline check-in counter for your flight to the Philippines. Only a valid e-ticket is acceptable but some airlines may accept those stored on a tablet/smartphone but this is not guaranteed. The Immigration Officer at your airport of arrival will very likely also ask to see your exit/return ticket.