I tend to be wary when people ask where to buy heatshrink (generic starter level DIY part) and USB cable parts (expert level) at the same time.
Are you looking for USB 2.0 (4 pin) or USB 3.0 (9 pin)? Or just for power?
Is this for learning or custom purpose, or are you looking for quality? Because you should go for factory-terminated if you want quality.