Credit card numbers, aside from the 4 digit credit card mask, are not stored in Sphere. They are not available for review or for exporting. This is to ensure Sphere remains PCI compliant

Rather, your organization is able to run a report on outstanding recurring gifts to review the contact information for those donors who still have recurring gifts. Those donors can then be contacted in bulk and requested to re-enter their payments in your organization's new processor interface. 

CyberSource is the payment processor used for Sphere. If you have further questions about this processor, you may contact CyberSource.