Hi Struggo and welcome to the forum. My guess would be that the coil is actually dead rather than just the built in module. For all the trouble and stuffing about, it would be far easier to replace the coil as an entire unit rather than fitting a module etc. etc.
If you cant get a good used one cheap enough online place a wanted post here on the forum. Depending on where you are in Down Under i'm sure there'l be someone close to you that will have one. I must have at least 10 of them in the shed.
Cheers, Ted
