Oh, there are several sizes, but just fatter, not shorter. They are all the same length, and only the S or XS doesn't stick out for me. I keep them to wear as tops (which I never actually do).
I think I have one or two non-mod inserts that actually fit me. The mod ones can be adjusted by editing the vertical offset, WHICH IS HOW THEY SHOULD ALL BE.
Well, luckily, all the ones I have are group gifts or hunt prizes, and I have never paid more than 1L for them. I don't wear applier dresses usually, but it's the principal of the thing.
Check the perms on them again, if there's a texture change script inside the panel it might still be modifiable and the perms just show up as no-mod. Obviously if they're rigged they can't be resized...
Oh, that's lame. The creator should fix it IMO. I wear slink a lot and the panels always need to be adjusted since she's got longer hips than other bodies.