Found the answer to my own question!
The right part number for the Jeep coolant is 68048953AB for a one gallon bottle (3.78 litres), but this is not sold in Australia.
In Australia, Chrysler Jeep dealers are selling a 5 litre bottle under part number 05103532EC - 5 litre, 5 year coolant AUD $96.00
Given that the cooling system is 14 quart or just over 13 litres, one 5 litre bottle is technically not sufficient for a 50/50 coolant/water mix if doing a complete full flush.
This stuff is HOAT G-05 formulated coolant.