As I mentioned, that stator studs are in the same position, and the Indian/Lucas stators and rotors are mechanically interchangeable. The CDI and points ignition Bullet main shafts are the same diameter, so it's just a question of cutting a reluctor keyway in whatever main shaft you've got if you want to fit the CDI rotor, assuming there's a similar spacer between the engine sprocket and the rotor.
CDI kits for old (alternator fitted) British bikes ARE available, it's just that the versions with lighting coils included have a pretty dismal output. The Ducati kit I linked to seems to do much better in that regard.
Boyer Bransden ignitions were notorious for going full advance at low voltage, some of their employees left to found Pazon Ignitions, which sells a similar after-market TCI conversion, except that they're better made AND their TCI boxes are designed to handle lower starting voltages. BB belatedly woke up to this fact, and their Mk4 ignitions now claim to be better in this respect.
There does seem to be a big range of Enfield models and variations over the years, a bit confusing sometimes.
If we ignore all the UK-built stuff, for years the Indian RE factory just produced the old 350 as far as the Bullet was concerned, then came the 500, then the electric start models, then the lean burn engines, then the 5 speed gearboxes, sorry, was that home market or export version? Points, CDI or TCI igntion? Then the UCE/EFI models... Just for fun I build anglo-indian RE bitsas with Indian Bullet engines and gearboxes in old UK-built RE frames (they bolt straight in), hours of joy just planning which bits to use.
Somewhere I posted a link to the RE Indian Retired Models (Pre UCE/EFI) parts book on-line, if you ever got insomnia I'd recommend it!
A.