Rising Thunder: I - Lightsaber.
This is set in the Clone Wars Era
This first chapter is a bit misty at first but
has a nice little paragraph with R2 and 'The Padawan'.
R2 wasn't very fond of Anakin, he liked Rex though, and it was on the bloodied battlefield whilst in the Second Battle of Geonosis when R2 received the message from Clone Captain CT-7567.
"Artoo, time to shine, buddy."
R2 responded with a series of beeps and clicks, which the clone seemed to be able to interpret.
"You want to know your first mission then? We, I mean He, needs a lightsaber. I'm sure an able droid like yourself is perfectly able to retrieve one!" R2 decided there and then that the best option was to 'borrow' a Jedi Padawan's Lightsaber.
The Jedi Temple, Coruscant. R2 was sure of whom he'd get the weapon from, Master Billaba's student, Caleb Dume. Caleb was an enquiring boy, who had become a pain for everyone, especially Billaba. How many questions does he have to ask every day? The astromech computed whilst wheeling through the Temple to where Dume was. With every security camera streaming a live feed right to his databanks, R2 knew right where the boy was. He would be able to get that saber in no time at all. Ckshhhhh…. The boy heard a droid nearing to his room. Beep beeeeeepp, the doors opened and in came the droid. Caleb recognized it as R2-D2, General Skywalker's astromech droid.
"Why are you here?" The padawan asked. The doors closed.
"Do you need anything?" Why did he have to keep asking questions! Then the lights turned off. From then on anyone outside the room would have heard a few knocks around the room, a lightsaber ignite, a muffled scream, and then seen R2-D2 exit the room with not a single scratch.
R2 quicly deleted any scenes from the SecCams showing him, and drove out the temple, calmly as if nothing ever happened, and then he messaged Rex about his success. He was picked up on the Modified Green and Red Firespray-class patrol craft, and they flew off.
"Rex, R2, Ive set coordinates for our next stop- Mandalore." A voice sounded from the cockpit and then its owner stepped out- Boba Fett.
Please Note that Boba Fett is Episode V Boba, but this is set in the Clone Wars Era.