Should've included a small pic that works.
I go get to these heavy transformers when the destruction guys go clearing out offices.
This is one that I have had for some time.
Radio-Shack ( if you find one who has an employee that's been around awhile and knows how to look on their shelves.
Does use a power transformer unusual way but...
Also output voltage is of course dependant on input and values should be adjusted to power requirements.
Also this doesn't output the power you're possibly looking for , but does work.
Bruce S