Prolast makes good, durable heavy bags, and there are several available on Amazon with free shipping. For example:
PROLAST 4 FT 135 LB Boxing Punching Heavy Bag Black & Yellow & Silver https://www.amazon.com/dp/B09R8Z5HS3/ref=cm_sw_r_cp_api_glt_i_52F60KTRRDPPP71V78ZB?psc=1