https://crimethinc.com/2022/12/15/producing-transdermal-estrogen-a-do-it-yourself-guide

Here ya go. Less safe than monitored by a doctor but listen it’s your body you should have the right to alter it as you wish even if doctors disagree, though you bear all risks of whether or not that’s a good decision.

Yeah, was about to say if the dream is driving Hotwheels cars across any breasts, why not grow your own?

If it has to be someone else’s, your solution sounds reasonable.