I have an 18 gallon propane canning unit from Leader that I've used for years but am getting tired of refilling the unit several times to finish off a 40 gallon drum. I'm looking for a canning unit that can hold a 40 gallon drum that is not 220v water jacketed canning unit. I've looked through the catalogs of several dealers and can't seem to find one so I'm wondering if anyone here knows of any options. I don't have a 220v circuit in my packing room and would prefer to heat the syrup with propane. Is that an option?