Update!!! Found a NIB Aqueon Quiet Flow 10 HOB and a black AquaTop PF-500. While not NIB, the latter was only used in a temporary tank for a week. Also found an AquaTop 75 watt heater. Plugged it in and it works fine. So do the two 50 watt Eheims I found and the three Mini-Therm. While everything works this is, of course, as is.
PF-500 Hang-On Filter