HAY LOOK ITS ORIGINAL THE CHARACTER DO NOT STEAL DERP.
I looked through TF wiki for any Autobots medics' name and Ambulon came up, strictly because he was a character who only appeared in a text-based story entitled "Bullets" in the "Last Stand of the Wreckers" paperback trade (which I have and it is a VERY awesome comic). So I was free to make my own design. I switched gender, made Ambulon a chick (or whatever, seeing as gender is such an ambiguous term in the TFverse) and because we don't see many heavy set women, I made her one.
I have in mind that they're in some obscure planet where bounty hunters (including Lockdown) other thieves and general scums of the world dwell to take a breather, including doctors who don't mind taking care of people of this sort.