so with alloy swing arm and 12/79 plate it is a 1980 T. i dont have a spare stator/flywheel. they are hard to find for AU models but you can still buy stator and flywheel new from suzuki dealers. ive bought a few US model stators, they are only missing the battery charging coil but you can also still buy that coil.
you can also fit 77-79 stators and flywheels. you need to drill/file/machine 2 slots 180 deg oposite the standard 77-79 slots and then it will work if you mount it on the slots you have made. the 77-79 flywheels are a little smaller OD and probably weigh a little less too so you might get a bit quicker reving motor. if you use 77-79 flywheels, you also need to use the matching stator
how bad are magnets broken? you can get special glue to glue them back in. Loctite do a magnet glue. would also be possible to fit magnets out of another flywheel.