Small oil filled electric heater (West Hill)

I live with a chronic pain problem which is aggravated by cold & dry. But I get relief from heat and humidity. And the oil filled radiator is the only type of electric heater I have found which does not also dry out the air. So I'm looking for a replacement to the small heater that finally died on me. I'm specifically trying to get a small one (500W to 700W), as that physically fits in the places I was using the heater I used to have. So a larger 1500W heater would not work as well for me.