https://www.amazon.com/dp/B08B4GJZVC/ref=cm_sw_r_cp_apa_glt_fabc_EVXW27M1D8F9MMT7Q7MS?_encoding=UTF8&psc=1

I got this one from Amazon for my classic as well. Make sure you get some nuts bolts and washers to seal up the holes on the back side of the drum to improve to airflow.