I haven't found any yet but I know it isn't just this bush that suffers this malady. I'm calling it that, because for the plant it isn't that good to have a hundred or more leaves out of food production. Not a lot of photosynthesis can happen in a rolled up leaf.
I'm assuming it is the same insect that rolls leaves in the different varieties of teak, crows ash and the like.
In my ignorant past I would've cut the leaves off and burnt them. It's quite difficult to stand by and just let it happen. After all, a hundred rolled up leaves means a hundred insects eating the shrub. I unrolled a couple and did not find anything other than droppings. In other words, the insects gone.
Hence I'm doing the usual, taking a look every day to see if I can see any changes, or signs of (insect) life though I can't imagine why these bugs aren't at home, with nights cold enough for frosts.