As the genuine unit is comparably expensive and no aftermarket replacement listed I went about trying to find something suitable, at least in Australia.
As I'm always looking for an alternative what I have come up with is a Tridon brand, part number TT239-180 fits the bill perfectly and is readily available over the counter at my local auto parts store. A trap for young players is that Dayco list an equivalent to the Tridon as part number DT26A but this does not fit. It is not offset like the Tridon (and OEM) nor does it have the bleed hole. Just make sure you go the Tridon part and all should be sweet
