If you're looking for shops in a more central location, there's Sunshine Plaza opposite Park Lane which has two shops that would suit most, if not all, forms of modeling. They're M Workshop and Hobby Art Gallery, though HAG is more focused on Gundam kits. Park Lane has a shop in the basement, Achtung Hobby Japan. Miniature Hobby is located in both Marina Square and Vivocity as well. In the eastern and western parts, there's Hobby Point in Century and Tiong Bahru Plaza respectively.