You can purchase a replacement plan for any radar detector.
When the 9500 first came out there were some issues where you could not get it. With x50 and the 9500 since they do not fall into the price bracket the replacement plan has to be manually keyed. This means the employee must key the sku of the replacement plan the computer will then ask them for the sku of the product.
If you want the prp...which i see no reason why you wouldnt just make sure they manually enter it.