I thought I'd write this to help anyone else and also to hopefully receive some form of confidence vote that I'm OK going ahead with my findings. Brit01 and the owners that responded to his similar thread back in 2007 may find this interesting...
After investigating I can confirm that the ignition coil I currently have is classified on the Bosch website as being an 'Independent aftermarket part (IAM)', code: 0 221 600 002. Next to my ignition coil is a 'Trigger Box', code: 0 227 100 123.
Unfortunately the ignition coil code: 0 221 600 002 has been discontinued. The website suggests a 'comparing product' - ignition coil code: 0 221 122 317 but that has been discontinued too.
The Trigger Box looks available on the website but doesn't make it clear.
These two ignition coil codes are the same codes that have been mentioned on another thread by Brit01 back in 2007 who also had the same Independent Aftermarket Part as me and then managed to purchase the 'Comparing Product'.
I'd like to buy a new ignition coil and preferably a new Trigger Box (also called an Ignition Module) so this is not good news.
I phoned Camberley Auto Factors and asked them if they can help, quoting both the ignition coil code 0 221 122 317 and the Trigger Box code: 0 227 100 123. They have an alternative ignition coil made by 'Valeo' at £29.94 and they have an alternative Trigger Box (Ignition Module) made by 'Intermotor' at £33.47. Both these items are in stock and a bike ride away from me so I feel quite lucky.
Ideally before I buy these I'd like to hear some of your feelings on this. "Go for it", "Don't touch them!" etc. I also wonder if it would be better to try to track down the Bosch Trigger Box or just go with the Intermotor version?
Cheers for any replies and I hope this has been of some help to anyone seeking these products.