I'm not sure if you are familiar with "OMG's Chocolate clusters" that popped on the shelves of most Canadian grocery stores a while ago. I believe it was on Dragon's Den and damn... they are expensive. For a little pkg containing 135g, they charge a ridiculous amount of $5.29. I can probably make a half kilo of them for that much. Plus, it's more fun if you are making it yourself anyway right?
2 cups milk chocolate
1 1/2 cup crushed graham crackers
3/4 cup unsweetened shredded coconut
add more graham crackers and coconut as needed to reach desired consistency.
After your chocolate has been tempered, add in your graham crackers and shredded coconut. I just take whole graham crackers and break it over the bowl of chocolate, no need to crush them before hand. Stir to combine all the ingredients. I like mine packed with graham crackers and coconut with just enough chocolate to hold them together. But it's your call how you like your clusters so if you prefer more chocolate then go for it.