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The whole hub replacement is the best route. You can buy the sensors separate but likely will not correct your problem and if it does will be short term.
Do you have access to a scanner with ABS Data? Place the data list in KPH (because it is more sensitive) when coming to a gentle stop watch the front wheel speeds and see which one stops reading first. Likely the right side but not always. The one that stops reading first is your suspect. One bad hub can cause both codes and it is not uncommon to have to replace both sides to correct. When you replace one side and drive the other side will stop reading first causing same problem.