Lifting Starcraft trailer equipped with Torflex Axle

Any competent welding shop could do this for you- just make sure to go to one that's done trailer axles before. It's important to get that puppy on straight.

Since your main concern is really driveways rather than off-roading, another perhaps simpler solution might be some of those wheels one attaches to the back bumper that lift the back end a bit when in such circumstances.