Source of T3 for UK patient

[Katipenelope]

I used to be treated with Natural Thyroid and for a while Tertroxin - which both contain T3 - for my underactive Thyroid. I am no longer being prescribed either of these, and a lot of my old symptoms have come back, so I would like to find a source of T3. I do not have a prescription. I live in the UK. Please respond by private message.

Thanks