Insurance on earthcruiser ontario. Canada ??

I am a newbie from ontario canada so pardon the basic questions. I have been trying to find insurance for a potential earthcruiser purchase . As soon as I told allstate I was going to buy a used earthcruiser they said no. No customized trucks (they consider earthcruiser a custom build. Unlike the airstream sprinter I own today). No trucks or rv worth more than 200k cad. (Obvious question is my driving record is clean / no claims or accidents and I am over 50yrs old) Has anyone else solved the insurance riddle ??

Thanks. Cameron