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.