It is not impossible to get an insurance plan for your parents who have retired. It all depends on what kind of coverage and benefits you want them to have. If you want to protect your parents and their assets, then purchasing a plan with built-in inflation protection will be ideal. Life and health are two plans that you can purchase that would provide everything they need to insure against financial and health risks.
In addition to this, having your parents insured is a good way to ensure that they have the protection that they need throughout their retirement, even if something were to happen to you. The benefit of getting a policy for your parents is that it not only gives you peace of mind, but it also can be a valuable financial investment that will serve your parents for the rest of their lives.