You will note that the ingredients are common and therefore relatively cheap. I think a kiwi would work well. The recipe predates kiwi's availability in the stores. The recipe predates almost everything, except the Cheeseparer.
Note: the "sour salt" is citric acid which many grocery store will sell, but you can also find it at the drug store and if that doesn't work crush a vitamin C tablet if the ingredient is citric acid. It keeps the apple and banana from turning that yukky brown.
Rujak--Tart Fruit Salad
4 cups water
3/4 cup dark brown sugar (light brown in a pinch)
1/2 t. crushed chili peppers (hot pepper flakes)
1/2 t. sour salt
1 T. lemon juice
1 lemon cut into eighths
sliced banana (not overly ripe)
orange sections (canned mandarin in a pinch)
peeled apple wedges
thinly sliced unpeeled cucumber
Boil sugar and water until it makes a clear syrup--about 4 minutes; remove from heat. Add hot pepper flakes and sour salt; stir until salt dissolves. Stir in lemon juice after syrup has cooled slightly.
About 2 hours before serving, mix syrup with the cut up fruit and cucumber. Chill in coldest part of refrigerator and serve ice-cold.
This is served as a side dish and eaten as a "refresher" between mouthfuls of hot food.
No idea where this recipe originated.
The Cheeseparer.