all i can say is that the pic i did using NBM petite had my boyfriend calling them "banana boobs."  and i hadn't maxed out the hang, and wasn't working on a very old figure.   now that said, i was going for a softer body, so i sure didn't try those other settings.  but then i think a thinner body wouldn't have so much droop.   i guess what i'm saying is that you guys seem to be saying you can't get realistic (standing) gravity effects with V4 and present morphs, and i really have not found that to be true.  i've got some serious problems with V4, i'm really eager to see NBS for V4,  i've had a lot of difficulty getting most figure's breasts to behave realistically in a lot of different posses, and I think shaping morphs are always great.   but i've definitely achieved breasts that aren't "perky" or "Hollywood" or "Silicone."

the problem i think you'll have isn't that the product doesn't exist.  you want to use this custom morph with multiple morphs, at least one of which is  i'm pretty sure is set to double what it was designed for.  i don't know that anyone's product will ever meet your needs, because those other morphs are changing the breasts, and i suspect substantially doing so.

i found some possible reference images, though.  before photos on a plastic surgery site.  i think i see what you're intending, but they're not smaller than A.  and the bodies i'm finding aren't nearly so bony (not thin at all, in fact).  i'll keep looking though, because i've got a vague notion of  seeing how hard such a morph is to make.

if you have Hex, why don't you try using that to make a custom morph?  and i realize that you don't want to do it in Photoshop, it just seems to me that taking maybe  two minutes in a tool you already have is preferable to just giving up.   but if you'd rather wait for someone else to come along and match your artistic vision, it's certainly your choice and the one that most of us make most of the time.  i really sympathize with your frustration.  but i do think you should keep trying rather than giving up.  after all, how are things going to change if people like you don't show how beautiful difference can be?