The old style condensers are not only buried in the end of the armature, but when new only had a 10 year shelf life ( never buy old, or NOS lucas condensers). I am a distributor of the Brightspark Easycap condensers in the USA, have a look at the manufacturers website in the UK for all the info:
http://www.brightsparkmagnetos.com/
If you are comfortable with the process, shoot me an email & I can sell you one directly, or if you prefer I can do it for you as well as anything else you may need. I can do just the Easycap, or restore the entire mag, whatever you like. I can also recharge your magnet while I have it & I offer FREE inspection & price quote as well as a 2 year warranty on the job, no questions asked.
A properly set up stock K2F will work trouble free for many years, unfortunately, many of them out there are in need of various repairs, have been butchered by previous owners, or were "rebuilt" by folks that didn't do a good job.
We will need to determine which Easycap you need, but figure $23 delivered to your door assuming you are anti-clockwise with a brass backplate.
In addition to being a superior capacitor to the OEM cap., you get the added bonus of relocating the cap. right under the points for easy access, although to be honest, I don't know of anyone who has had to replace one yet !
All the best,
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