I’ve switched to B58 ignition completely and just so happen to have a full, brand new, and unmolested set of plugs and coils I would be happy to part ways with for a bit under FCP’s price for their ignition kit ($230 + tax).
I’m asking $200 locally, $210 shipped over a fee free service, also willing to trade for N54/E92 parts.
Plugs are 1 step colder for N54, stock for N55.