What about this one?
Jeep Garage - Jeep Forum
If that doesn't work go to Search at top of page
When that box pops up click Advanced search
When that box pops up change Search entire posts to Search titles only
Fill in words "Blend Door"
Click search now
Searching only the words found in the thread titles instead of words in every post really cuts down on the search results and are more apt to apply to what you are looking for. Start with the threads that have the most replies in the discussion. Good luck.