You "might" find a frost plug heater for it (they are engine specific - certain frost plug & the angle it has to be installed) or you might want to try to find a lower hose heater - which would be an easier solution. With lower hose heaters all you need to know is the inside diameter of your lower hose. They're easy to install and work really well. You might try a Canadian Tire store & the brand is "Zero start" (avoid the other blankets & battery warmers - they're far from efficient)
Tip: install it as close as you can to the block and get one that is thermostatically controlled and you'll have no worries.