[2DXTRM]

So Ive got a parts number dilemma here with regards to the main parking brake cable that hooks up to the little cables that stick out of the drums.

Car in question is an 02 ZX5.

Now the dealer looked it up with the VIN number and comes back as saying the part number would be:
1M5Z 2A603 AA

Which needs to be special ordered (not normally kept in stock), but they have YS4Z 2A603 AB, which looks like what I would need.

I googled the first part number (1M5Z) and it looks like its the cable for an SVT Focus (rear disc).

Anyone ever encounter this (catalog says one thing, when in fact its the other)?
Whats the difference between the two part numbers?
Which one do I need (Im thinking its the YS4Z number)??

Thanks!