If it's your cable that's busted, You can buy the usb sync cable from most computer shops that carry O2 products (there's a popular one that's retractable). I think I saw one in the internet cafe accross Our Home in SM Megamall.
If your cable is fine, and your charger is the one that's on the blink, try switching it with a regular Nokia charger. It may feel like it won't fit at first, but it does, and it charges fine. (the wall chargers that is, not the car chargers).
If both of them are busted, then I would opt for the O2 sync cable (I think it's around P450). To charge, just plug it in the usb port behind your cpu--that one carries current unlike the ones on the keyboard or the front panel.