Enfalac is a great brand in Phils. My son has been on that. I actually agree with Irishman, babies are very adaptable, probably more than us, so a change is not going to make so much difference. Maybe for a day or two but not life threatening. If you are prepared, you can always wean the powders by mixing until you are on the new one over a few days, the baby won't even notice.
I think sending over by post is a bit extreme tbh