Alright, I have been holding this back for far too long... but I just could not get around to finish it after showing the WIP screens in the "Show what you are working on" thread a few months ago. But now here it is, and with a surprise: The egg sacks have an (optional) pulsing animation, as can be seen in this video: https://www.youtube.com/watch?v=HbRWfdIfxME
So without further ado (I'm also tired), here it is:
http://www.nexusmods.com/morrowind/mods/43555/?
https://www.dropbox.com/s/d2micbgun7d9ikv/Kwama%20egg%20sacs%20and%20eggs%20replacer.7z?dl=1
Have fun!