I am looking for this specific model since quite a while, but was unable to find it ingame. A google search turned up a lot of stuff from SWG, but I couldn't find a location for SWTOR.
Looks like the JA-3.
Unfortunately there's no way to acquire that one if you don't already have it. It was given as a reward during the Join the Battle subscription drive last fall, so the only way to have it is to have been a subscriber at the end of October 2013.
Note that the Hyrotii Racer uses the same model with an orange & black color scheme, and can be found (rarely, I believe) in Freelancer & Contractor's Bounty Packs. The Hyrotii Scrapper uses the same model with a grey & sky blue color scheme, and can supposedly be found from seeker droid spots if you're (very) lucky.
Edit: Freelancer & Contractor's Bounty Packs are purchased with cartel coins; they can also be purchased from other players (including via the GTN), as can the speeders that come out of them. Seeker droids are acquired in a level 53 mission on Coruscant or Dromund Kaas, and basically let you "dig" for buried treasure just about anywhere with a 15 second cooldown. You can very rarely get something valuable like a speeder this way.