Im not sure, bear in mind that I am in New Zealand so maybe I could find someone over here. In saying that I cant imagine it costing less than the $120 the guy wants for the replacement CDI.
Kiffsta, I just searched for the CDI number you posted and it appears to be for a year 2000 EX250 Ninja. Maybe their not as model specific as I thought.
Have put a wanted on the VJMC forum for you. Plenty of clever blokes on there play with electronic stuff so may get an answer.
There is a couple of these cdi boxes on ebay, one in UK, one in Japan. Just put in your part number. Also found a place called Small Coil Rewinds in North Geelong that does rebuilds of CDI boxes.