You can try asking this vendor if his magnet system will do that.  I've tried his breast control system to some effect.  Unless you want to do a number of morphs, and since you don't want to do dynamic, I'd be looking at magnets first.

WARK!

Thus Spoketh Winterclaw: a blog about a Winterclaw who speaks from time to time.

 

(using Poser Pro 2014 SR3, on 64 bit Win 7, poser units are inches.)