Andrew 1.2m ClassI vs. Andrew 1.2m ClassII

I have Linkstar modem and recently switched provider's from NSS6 to Eutelsat W6. I was told by the new provider that I am using the wrong dish for Eutelsat W6 and that is why my QPSKBER is low. I have a Andrew (Channel Master) 1.2m Class 1 dish and need a Andrew 1.2m Class 2 dish.

Andrew 1.2m ClassI https://www.andrew.com/search/BN_PA-100549-EN.aspx
Andrew 1.2m ClassII https://www.andrew.com/search/BN_PA-100550-EN.aspx

Does anyone know if I can convert a ClassI to a ClassII. It looks like the actual dish is the same, just the mounting brackets are different?

Does anyone have any info on where I can buy the ClassII dish or mounting brackets?

Thanks, Terry Caulder
terry@tcaulder.com