That is 5VA, not 5A. This is a low voltage transformer for things like doorbells.
https://www.ebay.com/itm/Edwards-590-Transformer-10V-5A-Load-120V-Line/121034476341?hash=item1c2e378...
Ebay has premade bucking transformers: https://www.ebay.ca/itm/Bucking-Transformer-Voltage-Reducer-For-Fender-Marshall-Gibson-Vox-Ampeg-Etc...
https://www.ebay.com/itm/Edwards-590-Transformer-10V-5A-Load-120V-Line/121034476341?hash=item1c2e378...
Ebay has premade bucking transformers: https://www.ebay.ca/itm/Bucking-Transformer-Voltage-Reducer-For-Fender-Marshall-Gibson-Vox-Ampeg-Etc...