Progesterone cream can be bought in Europe very easily, its typically not controlled substance as its dosed typically quite low. Same with estriol cream and bi-est which combines estriol and estradiol. Depends on your country though, but at least within EU these can be bought easily.
And grey market under the counter meds are just as easy to get too if you know where to look. There's no crazy horrible consequences from buying feminising HRT medications, they can't be used for doping or getting high so typically its very low risk.
Anyway, for prog cream, search for natural supplement stores which carry the stuff. It shouldn't be too difficult to find. And bioidentical stuff wins plant based ones hands down, there's no contest. But herbal stuffs can be good for supporting hormone balance. For progesterone levels, Vitex (Chasteberry) is excellent, especially combined with evenin primrose oil.