I have a pack of package / bulge morphs for M4 on my site.  Not magnets but oldfashioned morphs. All made by me though so they do not require any preinstalled moprph packs and as such they OUGHT to work in Yhago as well.

FREEBIES! | My Gallery | My Store | My FB | Tumblr |
You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.