Grand Voyager Power Latch Confusion
 

I have a UK 2002 Grand Voyager 3.3, the dealer wants £150 for a power latch (The ones on the power sliding door - Right hand side).

There are plenty on ebay but I am confused as to which one I need and I dont know the part number.

I need the one with the metal latch as well but some just seem to be a grey plastic box and I dont want to get the wrong one.

Any help would be great.