swensen,Geláre, Wild Hibiscus and haggen daz sell ice cream moon cake only i think
Source :
http://www.visitsingapore.com/insidescoop/apr06/localspeak/hybrid_food.htm#moon Ice Cream Mooncake
Price: SGD 60.00 per box of four (price subject to change)
Ice Cream Mooncake
Where to find it: Haagen-Dazs outlets during the mid autumn festival (usually around September or October, depending on the lunar calendar)
How did the traditional mooncake (round pastries filled with lotus paste and salted egg yolks) eaten during the Mid-Autumn Festival evolve into its new-fangled form? These days, even its circular shape - a nod to folklore's moon goddess this festival commemorates - isn't sacred anymore. Some "moon" cakes are now square. Better yet, many of them aren't filled with the usual lotus or red bean paste anymore. Innundated by the variety of fusion mooncakes. From ice cream housed in coloured flour skins or decadent chocolate, there's a different variation for every kind of palatte. Haagen-Dazs offers a luxe dessert with a mango sorbet "yolk" and ice cream like vanilla or strawberry covered in Belgian chocolate. And, there're even more exotic fillings like champagne truffle, coffee, bird's nest and wasabi-chocolate available at bakeries and hotels.