thermostat td4

I don't know if I'm miss reading this but im searching for a thermostat for the td4, as far as I know the part number i got is PBM100040. So I googled it and some sites say its a "oil cooler thermostat" is this right? Are there 2 different stats? I just want the normal coolant thermostat, is this the correct part number?

PEL100570L

pig of a job as well

this should help:
Diesel thermostat change, no water pump removal or engine jacking. - The 75 and ZT Owners Club Forums

cheers guys

Can you buy just the stat itself for the td4 or do you have to replace the housing at the same time?