I recommend this one: https://www.amazon.com/gp/aw/d/B0002F4VNU/ref=mp_s_a_1_4?ie=UTF8&qid=1501426734&sr=8-4&pi=AC_SX236_SY340_QL65&keywords=ridge+rider+cowbell&dpPl=1&dpID=310%2BS7gu79L&ref=plSrch
I also like this mounting adapter: https://www.amazon.com/gp/aw/d/B0002E1VYI/ref=mp_s_a_1_1?ie=UTF8&qid=1501426886&sr=8-1&pi=AC_SX236_SY340_QL65&keywords=pearl+cowbell+mount&dpPl=1&dpID=41IGzfb05DL&ref=plSrch