Companies often do this to loose some business in a particular area. Its the 'dont want all eggs in one basket'. Sometimes it is because they simply dont want the business anymore (My insurance company stopped doing motorcycle insurance for instance), we also had problems with our XR3i years ago. Many wouldnt insure it at all but we found one (very well known company) that would. My BMW is similar, I have to find a company sympathetic to BMW's.