Not these new-fangled 'coil packs', but the good old-fashioned coils.
One of the coils on the 75 is sparking around the HT lead socket - which I believe is due to the insulation in the casing braking down(?).
Whatever it is, I'll need a new one.
I've stuck the Bosch part number into Google, I've also Googled and checked a few parts suppliers, but without much luck.
What could go wrong if I take an old coil to a motor factor and just buy anything off the shelf that's the right dimensions?