I'm down the west of the island near Chania. I am sure there will be places closer to you that will sell them. If you go into any shop selling wood burning stoves they will probably have catalogues of various makes they can source. You need somebody near to you so they can do all the installation work.
Mine happens to be built into the wall because it had to replace an open fire of that design, see http://www.fireplaceproducts.co.uk/stov ... tte-stove/
for example but there are lots of makes. If you already have an open fireplace it should be possible to install a free standing one inside the fireplace more easily. I think they are possibly more efficient because you get heat off all the surfaces. The important thing is to get a closed model that recirculates some of the burnt gases.
It is also possible to get models that have a built in boiler that will heat the water and run a central heating system. If you do go down that route it is important to get a small portable generator to keep the pump running in the event of a power cut.