I think some people on sister site easy garden have them. You might want to post over there.
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I think some people on sister site easy garden have them. You might want to post over there.
Do you only have room for one tree? If so, it may be a good option to get a tree grafted with different fruits.
It reminds me of the Skittles commercial. "Taste the rainbow."
There is no one kind of "fruit cocktail tree" so it's hard to say if it'll be hardy for you. As per your links, what they are is a tree with several different fruit tree branches grafted onto one main trunk. So any fruit tree that is hardy in your area can be used to put together a "fruit cocktail tree." You can do different apples and pears on one tree, but I don't know off-hand about peaches and plums being hardy in Western MA. So I'd first suggest finding out what fruit trees can be grown where you are, then sorting them into groups that are related enough to each other that they can be grafted together. An alternative is to do the "four trees in one hole" bit, whereby you plant close together several different trees, ideally those that ripen at different times, and allow them to grow together sort of as a shrub. See the link below for more info.
http://www.davewilson.com/homegrown/BOC_explained.html