Look on amazon. I’m assuming you have a trigger that is just a pedal with no pedal striking a surface. Buying a legit kick trigger and a real pedal will be an upgrade for you.
Alesis DMPad Kick Pad https://www.amazon.com/dp/B003KZBEDO/ref=cm_sw_r_cp_api_i_Cjb4Eb0BD5PVZ