Up to 70°C Smart Temperature Control Multifunctional Heating Mat 3D Printer Heater Mini Greenhouse Heater for Green Tent and 3D Printer Enclosure Keeping Warm, Filaments Drying (Heat Pad)

you have more problems than heated enclosure, but i use two of these pads to heat my ecc chamber (magnetic tape on the backside to stick to walls) https://www.amazon.com/dp/B0DKPDPPFG if you aren't handy with soldering, you'll need something like these to get the plugs inside through the filament run out cable port https://a.co/d/0hNPUSwp

https://www.amazon.com/dp/B0DKPDPPFG two of these plus some male/female adapters and ran the wire through the little square behind the filament run out sensor. use some 3m magnetic adhesive tape to get it to stick to the walls.