This is such a strange question. If you're looking for transgirls who aren't botched then just look for natural girls with no implants, because 99.9% of transgirls with fake asses/tits look terrible. Seriously, out of the countless out there there's probably only enough to count one hand who don't look botched.
I have a specific preference for natural thick girls, flat asses make me weep. Even with trans it's not much trouble finding them. So if you can't find them then you're just not looking hard enough, or in the right places.