Coolant for 2003 Avensis?

[Condi]

I have a 2003 Avensis with a 2.0 diesel 1CD-FTV engine. The book says it needs "Toyota Genuine Long Life Coolant" or equivalent, but what is the equivalent? Euro Car Parts says I need "waterless coolant" (which sounds like bks!) while Halfords systems say that pink OAT is fine. So far Halfords system has been better with the oil specs, and given the age of the car then OAT sounds about right, but can anyone confirm please? The thing wants a good flush out and some new coolant as what is there hasn't been changed in a long time.