Looking for an iPhone charger

There are two places that I know that sell cell chargers, quite near you.

Half way up (from PNL direction) Ton That Tung Street (and dead opposite Suong Nguyet Anh Street) there's a computer store (right behind the damn great tree) with a counter on the left of the store who always carries a range of used power packs.

If he doesn't have what you need, cross to the other side of the road and walk on up - there are one or two knock off Apple shops.

Still no luck, the keep on walking to Nguyen Thi Minh Khai Street, hang a RIGHT, and there are more knock off Apple stores.

Finally, keep on along Nguyen Thi Minh Khai Street to CMT8 (Cach Mang Thang 8 Street)  and there are some more stores there.

Have the unit tested before you buy.

Apple, stupid as ever, uses a couple of extra resistors in theirs to make it incompatible with others.