Where to find a transformer for an ARC sp-3?


I called Audio Research and they don't have them/
Convert?fit=crop&h=128&policy=eyjlehbpcnkioje1mtmymtyyndgsimnhbgwiolsicmvhzcisimnvbnzlcnqixx0%3d&rotate=exif&signature=474802f16866063910735eb2e3d39a240da2d7e9ae2df8f390f19423f1596cf0&w=128baranyi
What about DIY one within the same specs?
thank you Single ended. I considered that route but on another website I was told about Tranformer winding service out of Maine. He rewind the original transformer.