I've broken only the backs too....a couple different times.
In fact most of the damage on my Outcast has been to the rear end area,I guess too many hard rear wheel first landings.
Balance wise,there's is a bit more weight in the back than in the front that would explain the reasoning for this.
These HPI shock ends (the small ones) will work with just a slight modification.
https://www.amainhobbies.com/hpi-ra...wvCHsqaCpGufQxMkHzXgjKr6R15plt2s53xoCDs3w_wcB