https://jandkaudiodesign.blogspot.com/2015/04/audiophile-isolation-transformer.htmlJ&K Audio has a ton of options, from smaller lower end models to higher end ones with expensive transformers.
There is also ones from China. If you search on aliexpress for "PLITRON Isolation Transformers", you'll see a couple that supposedly use actual high quality Plitron transformers for their isolators.
There is also ones from China. If you search on aliexpress for "PLITRON Isolation Transformers", you'll see a couple that supposedly use actual high quality Plitron transformers for their isolators.