(EDIT - Firstly, thanks to Beaver for supplying all the names of the parts in his opening post)
This has been a fun challenge looking all this up on ebay tonight.
Here's the list I came up with.
But as fun as it was looking it all up. I still wouldn't know how to wire it up, or if I picked the right parts.
The links below were the 1st I found searching and therefore the cheapest.
PID Controller + Thermocouple - 12V -24V DC AC Digital PID Temperature Control Controller 2 Omron Relay Output
$15http://www.ebay.com.au/itm/310912817604 ... 1423.l2649
Fan/Blower - White Brushless DC Cooling Blower Fan 12V 40X40X20mm 4020S New
$5http://www.ebay.com.au/itm/White-Brushl ... 1003843840
Power Supply - AC 100-240V DC 12V 4.0A Adapter Converter Power Supply
$2.50http://www.ebay.com.au/itm/AC-100-240V- ... 0571152732
Relay - 12V DC Bosch Style 20A/30A Car Auto SPDT Relay Harness
$5http://www.ebay.com.au/itm/12V-DC-Bosch ... 0612553847
K TYPE THERMOCOUPLE SENSOR 1 Metre LONG 0~400deg C
$6http://www.ebay.com.au/itm/K-TYPE-THERM ... 1145458807
Total cost = $33.50
I dont want to seem so lazy so early.