Amaricans & Canadians in the house: 110v to 220v converter?

To all the Americans and Canadians in the house who have come to SA with a US device, and if you didn't bring a step down converter with you, do you know of a place in cape town where a step down converter can be bought?

The only online stores who have it are going to have it shipped from abroad. I do not ewant to wait that long. Thanks

Try building supplies shops.
Most professional power tools operate through an isolation transformer at 110v so that's a good place to start.
They're yellow and ugly.