Unplug the MAF (plug that goes into the airducting after the airbox, bottom left of engine bay) isnt that meant to be a good way of determining which version of coil pack you require?
Seem to think as of MFL onwards, they're all the same plug, yes, so only the 'oval' plug, the square type was the earlier.
Bosch or GM are the recommended ones, and its a part that many are happy to pay up for a decent second hand over a brand new cheapy (so like catalytic converters, in that sense). Not sure how the cheap n cheerfuls fare, however I suspect the one I'm running on, though I bought as
probable GM, is in fact a cheapy - with no ill effects so far after 6k miles
EDIT: of course the 2.6/3.2s use a different ignition setup, entirely without HTs, but I'm assuming this is already known by the OP/irrelevant as he's already got some HT leads