43536-19C21 is just the balance weight screwed to the bottom of the 43510/43520-19C22 footpeg
43510-19C22 & 43520-19C22 have threaded hole in end for ‘bank sensor bolt’ but 43510/43520-19C02 do not
Other than that, 19C02 & 19C22 Footpegs are interchangeable