thought I'd drag up this topic in the summer so y'all can be getting ready for next winter

.... I just scored one of the Land Cruiser rear heaters that Bart referred to above - fits '68-'84 and will work admirably as under the seat heaters for the panel/burb - look
like this - the one I found had the hoses still attached, including a pair of brass "Y" fittings to split the hoses to both heaters
Bill