If you can't find frappe mix, you can make them from "scratch". You may already do so. But if you have a KILLER mocha frappe, you'll basically never need any other frappe. I've tried samples of powder frappe mix...but...it isn't as good. So we use a mixture of non-dairy, chocolate sauce of choice, espresso, milk, and ice. I use the non-dairy as a thickening agent to add creaminess and texture. I've joked about the frappe's, because we have several to choose from, but really only sell 3 kinds. The mocha java chip (chocolate chocolate chip), C&C (vanilla bean with oreo's), and the Coffee Toffee (english toffee with toffee bits). They're all....awesome!
If you still can't find more info about that, I highly recommend Frozen Bean Frappe Blends. They have the best quality blends and base mixes that I have tried thus far. They do ship internationally and do give out free samples if you want to try them out first. Just go to their website thefrozenbean.com good luck!