First of all - anyone that comes in this thread and makes fun of the subject matter is going to get their clock cleaned.
With that being said:
Can anyone recommend an item (currently available) that contains some good examples of cowboy yodeling? I have heard some CDs where on one of the tracks there will be a yodeling tune, but I would like to get an album that has several songs with that unique vocal exercise, or even better, a whole album dedicated to that fine form of music.
Would you suggest any one particular collection by Gene Autry, Roy Rogers and/or The Sons of the Pioneers as being especially filled with yodeling tunes?
Well, here’s a place to start.
This is the best I could come up with. yodelling I’m guessing that shipping will be spendy though.
Why, pardner you’d be after Yodel the Cowboy Way by Riders in the Sky.
dumping bag of dirty clocks on floor 
Just so you know, yodelling makes my cat put her ears back and bolt out of the room. I first saw this when I was watching “Raising Arizona”, and my cat bolted when the yodelling theme song started up. Fun for everyone!
Are you looking for Jimmie Rodgers-style blue yodels or the Swiss variety? Rodgers yodeled on nearly every song he sang. Harmony yodeling was the Sons of the Pioneers’ trademark, and they used it a lot.
Some of the greatest virtuoso yodeling I have ever heard is on Kenny Robert’s version of “She Taught Me How to Yodel,” a song that was also recorded by Frank Ifield. “Chime Bells,” recorded by Roberts as well as Elton Britt and many others, is another yodeling classic.
I haven’t seen a collection devoted solely to yodeling, but any anthology of recordings by one of the above artists (with the exception of Frank Ifield–he didn’t yodel very often) would have at least a few great ones.
Randy Erwin
Wylie & The Wild West
Don Walser (The Pavarotti of the Plains)
Not cowboys, but identical twin lesbian Kiwis: The Topp Twins. Funny, weird and good.
Oh, man! You won’t believe “Chime Bells” when you hear it! Listen to how long he holds that high note at the end, it’s almost unnatural!
I thought for sure, from the thread title, this was going to be about Polka. In which case my answer would be Brave Combo’s Grammy-winning Polkasonic.
Oh, indeed and their classic crowd-pleasing performance of That’s How the Yodel Was Born leaves not a dry eye in any auditorium or supermarket parking lot in which it has been performed. There’s a reason why Ranger Doug is “The Idol of American Youth”