House in MD has polybutylene water supply line, anyone know of any insurance I can get for it?

[Chris K.]

I'm looking at a property in Maryland that has a polybutylene water supply line from the street hookup to the inlet of the house. There is no chance the seller will replace. Is there an insurance that I can get that would cover exterior pipes? I've already checked with my homeowners but they said they won't insure it. Just wondering if anyone knows of any insurance options.