I am looking at a building an electronics project that calls for a transformer with a specific turns ratio '1:4:50', and am trying to source a component. I am working on the project from this tutorial: https://circuitdigest.com/electronic-circuits/diy-stun-gun-circuit
When I search power transformers on Mouser or Digi-Key there is no option in the parametric search for turns ratio. The only category that does have a turns ratio option is 'Current Sense Transformers', but after reading up on these devices (used for metering AC current draw) they seem incorrect for my application. The purpose of this project is to use the transformer in "flyback mode", building up a large DC charge from a small AC signal at the input. I am assuming for this application I need a power transformer.
This part has been weirdly impossible to source, which seems strange as the application isn't that esoteric. Can anyone give advice on how I would go about searching for correct component?