Any retailer willing to ship to a US address using a Philippine credit card would do. For dive gear you have Leisurepro, Dive Right in Scuba and Piranha Dive Manufacturing. Many dive stores also have Amazon storefronts. Yes I have used Johnnyair for things I cannot get locally like HOG and XDeep stuff. I also got a few specialty tools for my regs. For stuff which is locally available its is better to get it here for warranty purposes and support. They are also cheaper to get locally in the long run. You can also post it here if you need something. (I think you know that already ;-))
Thank you! If ever you find yourself in Dumaguete look me up in Atlantis and I'll buy you a drink!