Radiator - I got it for $3 from a scrap metal place but i am sure its identical to a heatercore out of a 91 toyota Camry. Fans are 120mm and the rad is about 145 wide and 240mm long x 30mm thick. Same as the Big Arse
Tubing is called springflex (but has other brand names too), its about $NZ6/metre and will out turn tygon any day but it does make a bit of sideways force hence the zip tie braces. The spring part is actually inside the tube wall, ie it doesn't contact the liquid and its food grade you i can drink my liquid after
you can get it at most hose/tuging places.