Some isolation can realy help.
There are foam linings that can fit several models, but maybe not yours. You can also use some styro foam and silicon caulking to make an isolating lining. This will also help reducing your water useage.
I've seen some nice drip pans that fit between the cistern and the base and direct the dripping condensation into the bowl.
You can also reduce the condensation by lowering the humidity level in the house. If you use an humidifier, set it to a lower level. When showering, if you have a ventilation fan, turn it on to expel all that steam...
Electro
January 2013