Tower has replacement c-clips rings for under $2 for ten. Hope that helps.
Also, Hobbycity/king now has the right pliers:
Originally Posted by tlewter
I have a question...the small snap rings on the motor shafts have been nearly impossible for me to remove without damaging them
. Is there a tool small enough to use on these thing or do I just need to purchase a bunch of snap rings? I did get some snap ring pliers but were too large for these snap rings.