It looks like the HTL missiles first started seeing use five years ago, I'm guessing from what I've seen looking around normal maps on FreeSpace are about five, six years old as well, and the Ursa, which was HTLed five years ago as well, still does not have normal maps.
Reskinning the Hornet would probably be a decent place holder for the time being...shouldn't be too difficult, I'll give it a try but I'm not expecting the real deal for some time still, it's interesting how some of the little things remain half-finished or untouched after so many years.
Edit: Actually...the only real difference is the shape of the missiles themselves (Fin number and bulk on the aft) the textures are rather the same...
On the tech .ani anyway.