Reverse/Remove Unapplied Credit Memos

Summary:

We need a way to remove a fairly large number of credit memos that were created, but have no transactions to apply them against.

Content (required):

We have a number of posted credit memos from prior periods that have been created and now need to be reversed or deleted. Would anyone know of a way to do this easily. We could create invoices/debit memos and apply them, but would there just be a way to either reverse them or delete them? I don't really think we have much choice in the matter - I think we will need to create debit memos, but I know the users are going to be unhappy so I thought I would ask. Thank you for your help.