(Yes - the wafers themselves!)

Recipe's in Japanese, you'll have to translate the page.

白玉粉で簡単♬手作り最中の皮 by miyucyann 【クックパッド】 簡単おいしいみんなのレシピが394万品 (cookpad.com)

白玉粉で簡単♬手作り最中の皮 by miyucyann@cookpad_jp

I've been looking for a Monaka SHELL recipe for a long time.