You could use apples or bananas.
When people need to coat something slick in batter, they flour it first so the batter will stick. Maybe you could coat the orange or other slick fruits like peaches or plums or whatever in cocoa powder and then dip in chocolate.
Then there's also dried fruit like apricots.
Every year for the 4th of July we go out on a big boat to watch the fireworks from the ocean. I always make a BIG platter of chocolate dipped stuff for us all to munch on. You can pretty much dip anything in chocolate. I have dipped apples, bananas, oranges, blueberries, raspberries, etc. Just dry it off with a paper towl first. My personal favorite is chocolate dipped potato chips (make sure you use the ridged variety).
i dip cherries to make my mice, but you can just dip the cherry part and not make the mice. when i make the mice, and have leftover chocolate, i dip everything! lol. anything i can find that's not nailed down or moving! 
(i also like chocolate covered pretzles, but some people say they aren't a fruit! lol)
thanks! okay, i dip in melted milk chocolate chip usually. but i made mice for thank you gifts for my open house and used candy melts because they were on sale. i put in the fridge and this happened (see below). i probably won't use the candy melts again and stick to what i know. i always put the mice in the fridge when i used the choc. chips.
ps how did you make the mice?
the bodies are maraschino cherries with stems, dipped in chocolate. then when the chocolate is still warm, but just a little set, attach a hershey kiss for the head and almond slices for the ears. then let them dry completely and use decorating gel for eyes and a nose. viola! chocolate mice!!
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