I just got a response back from ASV, they are saying they are pretty sure that the 250 ones fit, but they are going to check with kawasaki for part numbers.. I told him about the ones you tried, so we will see, he said give him a few days and he shoudl get back to me, if not to email him back as a reminder.
Did you email CRG? or do you want me to send one?
EDIT: OK I just looked up CRG, I remember now I tried to find their home page and couldn't... I only found retailers that sold them online... SO I did not sent them an email. ;D