Where to buy T3 online in UK please?

[Jtk11]

Can anybody tell me where I can buy T3 online in the UK please? Yes I understand the risks & will get frequent blood tests but my doctor says that everything is in normal range although since starting levo my symptoms haven't changed. My numbers are all over the place but TSH still high ish even with Free T4 at high end which it is usually every time I get a blood test, so adding more levo at this point seems useless. This leads me to believe it's a conversion issue or I need some T3 but obviously doctors don't like prescribing it here. My latest numbers -

TSH 6.70 ref range 0.27 - 4.20 mlU/L

Free T4 20 ref range 12.00 - 22.00 pmol/L

Free T3 4.6 ref range 3.10 - 6.80 pmol/L

Antibodies negative

Iron, ferritin, B12, vitamin D all good. Testosterone good. Not sure what else to look for.