Yea, that one is expensive and hard to find, Bigger ones is easier to find. The one im using is from an old ship.
Here is new ones and not so expensive. I dont know if thay clean as good? But its mutch better than a regular filter.
http://www.wvodesigns.com/raw-power-centrifuge.html
http://www.pabiodieselsupply.com/
Hello Sir, thank you again for the reply. These are real interesting sites. If you know any more similar sites, please keep them coming

However, the filter I mentioned in my initial post is actually a magnetic filter. Please see below specifications:
TECHNICAL AND OPERATION
FEATURES
This kind of filter is suitable for "wasted oil" filtering, which
is to be used as fuel for burners properly studied for this
particular function.
The particular features of this filter, the high adaptability
and the safe reliability confirmed by several years
experience, allow to fit this filter to all equipments which use
wasted oil.
Made of simple and solid construction, this filter forces the
oil to follow a particular circuit, which we underline the
characteristics of:
1. Filtration made through one strainer filter ; decantation of
eventual water traces.
2. Magnetic filtration through one filter n.1 which allows one
perfect separation of all ferrous impurities conteined in
the oil.
3. Mechanical filtration through one lamellar filter (filter n.2)
which allows the final filtration of all impurities.
The cleaning of this filter is carried out by simply turning
the hand wheel placed outside on the filter, even if the
plant is in function.This characteristic offers economic
and practical advantages. Therefore, one electrical
heater constantly connected with the electronic control of
the temperature, keeps the oil fluid for an easier filtration.
Also, I actually checked with the pump manufacturer and burner manufacturer, and they said it is okay. However, the heating temperature will need to be set at 60°C.
I attached pics of filter specifications.