Once I made my initial DL-44 Blaster conversion (http://www.thingiverse.com/thing:882673), I thought it only fitting that I make the whole gun belt as well.
These files are for the hardware bits for the gun belt and the droid caller. Beyond these parts, the belt will still require some snaps, rivets, leather and of course some knowledge of leather crafting.
I make no claim that these parts are 100% screen accurate, especially the droid caller, but they're pretty close (as far as I can tell).
Print all pieces in the orientation provided.
You'll need to print 3 of the belt-closed-attachments and 2 of the belt holster attachments.
For the buckles and connectors, I'd recommend 3 shells and 35% infill, just for strength. For the greeblie bits, just use your own judgement. You may want to print the gas cylinder inverted and with a raft, so it doesn't wobble.
Attach the belt-closed-attachments to the buckles using a 2.5mm x 45mm nail/bolt/screw/wire. The belt-open-attachment should be applied to one of the front buckle connection points so that you can take the thing on or off.
Speaking of the buckles, if you want the ANH/ROTJ look, belt-buckle-a should be in the front, and belt-buckle-b should be in the back. For the ESB look, it's the reverse. I don't know why.
Assemble the droid caller based on the diagram provided.
For the leather patterns, I'd recommend doing what I did and reading through the RPF here: http://www.therpf.com/showthread.php?t=202133