Disney Telefilms with Tippy, Scott, and Catfish

Recently I saw two Disney telefilms with the same characters:  three kids named Tippy Durden, Scott Durden, and Catfish Jones.  The telefilms were Secrets of the Pirate's Inn (1969) and The Strange Monster of Strawberry Cove (1971).  I really enjoyed these two shows, and I wonder if Disney made any more with these characters?  Thanks for any information.