For those interested in changing their Luke II EMG's to passive…
Here is what Dimarzio says about the availability of the pickups in the LIII guitars. You can of course buy a transition bridge or neck pickup for the humbuckers, but the single coils in the HSS LIII are not available to purchase it would seem. However, here is what they told me in an email about an alternative:
“The pickups in the neck and middle are very similar to the Injector neck model (DP422). To install directly in a Luke II, you will need to special-order them with no flange. You…
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Source: http://forums.ernieball.com