I doubt the eviction insurance will help that much. From my Google search, it is small part of the whole package from the property management company itself. It can’t be sold independently.
Most serious and unpredictable costs resulting from eviction is lost rent and property damage which the insurance doesn’t cover at all. The eviction itself is not too much expense relatively speaking. Some eviction services charge as low as $300 plus court filing fee about $260. If you got default judgment without courting hearing, the cost is small. Once go to trial, the cost adds attorney fee which can be another $300. In generally landlord most likely win if tenants fail to pay rent and all the legal steps are done properly.