If you are looking for a new flyback transformer I have been using https://www.donberg.ie/ for a few years and they have alot of them, so check them out. The transformers they sell seem to be made by HR.
To see if they have a transformer for your TV or monitor use the search tools below.
Ordering a transformer
Once you have found the HR part number for the transformer you can ask https://www.donberg.ie/ to order it for you.