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The 450X uses a battery and charging system , without that you can't "interchange" parts , so basically , no the kit for the 450R would be different than the 450X ......With that said , have you tried contacting Baja Designs ?? , they should make a kit for it , or several for different budgets depending on your lighting needs ....
If they do not have a specific "kit" they should be able to help you get the specific parts you need to make it work for your bike ...... But I think that would be your best bet for doing it correctly without worrying about complications or frying something by doing it incorrectly