There are quite a few other senators and reps that endorse him. I don't have a comprehensive list and the wiki list is way out of date. My favorite endorsement is Sheriff Joe Arpaio. (Anyone got a full list out there?) But you can see video clips on YouTube posted by GovMitt Romney of many of them.
Senator Jim DeMint on why he supports Mitt Romney for President - YouTube
Sorry unless its an action or comedy video I read.
I do look at endorsement lists, because it is a clue to who a person really is.