The Thomas & Friends episode "Jack Jumps In" when released in the US in 2004, was released on the DVD "New Friends for Thomas". This DVD was unique in that it was the only DVD to be narrated by long time UK Narrator Michael Angelis - this release being inbetween the hiring of Michael Brandon and the leaving of Alec Baldwin as narrator in the US. This episode along with "A Friend in Need" were narrated by Alec Baldwin, however for consistency on the DVD, Michael Angelis' UK Narration with some dialogue redubbed by Angelis were included.
The Alec Baldwin narrations of "Jack Jumps In" along with "A Friend in Need" were shown with the Alec Baldwin's narration on May 16, 2006 on TVOntario in Canada. 
Two recordings of the episodes had popped up on YouTube in 2006, before being privatized in 2007. These videos were both of exceedingly poor quality, being only filmed in front of a TV Set.
"A Friend in Need", the second part of this episode was released with Baldwin's narration on the DVD "Mud, Glorious Mud" on May 6, 2008. However "Jack Jumps In", despite being the first part of the story, has failed to be given an official release, or show up through any fan recordings online.
Update: Baldwin's narration was uploaded to dailymotion on July 5, 2014 albeit in low quality recorded off a TV on a phone.