1) Stay with the OEM system, and eventually get it rebuilt. It has "smallish" output, but adequate unless you are running extra lights, heated gear, etc. It is recommended to carry an extra rotor and diode board.
2) Upgrade the alternator to 400, 450 or 600 watts; it is recommended you carry a spare rotor in this case also, but you have plenty of watts to use
For the above choices your only option to fix your failed alternator is to go back to the original supplier of the alternator which is the dealer or the aftermarket supplier and they are closed much of the time (think you just broke down Friday night in Kingman, AZ
3) Run a Bosche alternator such as in the picture. It can be fixed at numerous Bosch repair shops worldwide.
Above is a wonderful picture of an 800 watt Bosch alternator set up for the R80G/S model. From https://airheadadventure.com