Turkey pot should do for the heater part. For the filter,----how about a remote spin-on filter unit off of an old industrial motor, or something from a used parts yard.
For the pump, any small hydraulic pump would work. Belt drive it to isolate the heat for a while. set the pump and motor on a temporary board with a long belt then motor would be away from the heat. ---- just thinking out loud here!! LOL!

"A machine you build yourself is a vote for a different way of life. There are things you have to earn with your hands."