Good question. It came out in Canada (I reviewed it for DVDtoons), but apparently never appeared in the US. I figured that maybe WHV decided to hold it for the Season 6 set, which could have made sense, but it doesn't look like it's going to be there either. Sorry, I wish I knew more.
I actually was able to get one through Overstock.com here in the States. Don't know why it was available, but it was and I snatched one up. Other than Overstock, I never saw it offered from a U.S. retailer. Don't know if it's still available through them or not.
Gary "I was just about to order it from Amazon's Canadian site when it showed up at Overstock.com" O.
I dimly recall a pebbles song in it but I'd still like to have it. It was one of those movies that always seemed to be on on a rainy day or sick day and really cheered me up! Hey there it's Yogi Bear! is another favorite.