I have just been through all this so I can tell you that you can change the rear mount in around 1 hr or less once you have a plan.
1. jack up car and put stands on the side.
2. loosening engine mount nuts on subframe underneath
3. loosen exhaust from manifold(2 nuts)
4. unbolt gearbox stabilizer arm and change arm from gearbox,makes more sense when you get underneath
5. undo 2 mounts bolts on rear mount (12hex)
you might have to lever the engine around with a long screw driver to get some leverage to pull the mount bolt away from the gearbox.
6. cut the threaded rod on the new mount alittle(10-12mm) to make it easier to reinstall
7. reverse order for re-install
Now heres the tricky part.
I orginally got the supposed part from auto one. Long story short it failed after 6 months(split) I never felt comfortable when I installed it.
I then ordered the right part from Suzuki same part number for the hatch and MB.
I installed it and I still dont feel comfortable with it.
It seems to put to much strain on it in the normal position.
the threaded rods should be offset in my opinion.
BTW my other mounts where new as well (Left and Right)
SUZUKI PART NUMBER 11710-78401 mounting engine rear
I will try and post part numbers and photos i took