This is what I used plus a cheap 120 mm pressure fan

Aluminum Heat Radiator Heatsink... https://www.amazon.com/dp/B07V3VNFCD?ref=ppx_pop_mob_ap_share

Thermal Adhesive Tape 30mm by... https://www.amazon.com/dp/B075F37SQG?ref=ppx_pop_mob_ap_share