High Quality Step Down Transformer?

I cannot help you directly, but I can tell you that any solution other than a step-down transformer is better.

nearly two years ago i moved from nyc to hong kong. there was (and probably still is) a shop called overseas appliance (or overseas electronics). they sold me a pair of "big star" step down transformers. made in china. i'm happy with them--as happy as you can be using step-downs. they run my cj tube gear and they ran my cal. cd player before i retired it. good luck.

sorry, the name of the transformer manufacturer is "seven star" not "big star."