Can I use my unit without using the Window Kit? It's a Medea made in china?

The window kit and the hose that goes with my Medea (Midea?) portable air conditioner are broken, Is it possible to use the unit with out them, or rig something up, somehow. I have tried to get a new Kit from the distributor in Melbourne, to no avail. The unit is made in china. I could buy a new one, same brand, but there is nothing wrong with the actual unit. I was just sitting there thinking & asked myself, can I use it without them? If so how, if not, why not?
Please help, it is very very hot in my rented house, virtually nothing in the roof to buffer the heat, either.