Heater for Deere 650H

i have an open rops 650h deere dozer looking to put a heater on it for a little more comfort when using in the winter months. I do have a soft cab for it which is a tremendous help keeping wind off of the operator. If I recall correctly when checked on a factory oem unit that fits under the seat but they wanted a lot of money. Looking for suggestions for alternatives, or possibly someone dismantling a cab machine with a good heater or a lead to an oem style. Thanks in advance. Looking to...

Heater for Deere 650H

Heater for Deere 650H