thanks for pointing us to evil dolly's page, subgrrl. Nice stories.
Here's my guess:
Rehab Center by Pete, published on karenfetishworld.com on 30.08.2006
Karen steals a candy bar, is captured, sentenced, sent to the Rehab Center, put into the kevlex suit (among other things)...
Here's the catch:
I only have the first part of it and even wayback machine didn't seem to have archived the story, just the link.
You might want to search Deviant Art for Karen stories. Some of them showed up under user monsterp63 and jarjarjarjarjar, not this one, yet, though.
I don't know if it is actually the droid ... story you were looking for. The beginning seems close.