Needles and hrt

So I have the doses and needle size and all figured out but I went to buy needles on Amazon and it said they weren’t allowed? So I went to I think it’s called cdw diabetic but I’m not sure if that’s gonna work out

I will be using a 31g .3ml 8mm needle size

And I will be taking 6.5mg of estrogen enathante per 6.5 days, what sites do yall use or could I buy them in person somewhere, for needles and hrt?

Perchancee 🤔