I had trouble finding it too, if you live near a whole foods store that may be a good place to look. I just made mine with soy flour, white cornmeal eggs and flavor.
Sorry josh Semolina is a WHEAT product but its more clean
It hardens the bait more it is used to make your own spaghetty
I realy like soy flour as an ingredient but its fatty this makes the boilie fluffy and sinds the milk powder has the same fat contend thats why i left it out!
Every ingredient has its own purpose in the bait besides the taste
There are atractor ingredients mainly for there taste
There are bulk ingredients to harden the bait but they dry the dough making it harder to work with
so you need fatty ingredients to make it easier to roll
This is why you need different ingredients
Food stores and bakery suppliers are always a good place to look and try buy big amounts its much cheaper
The fun part is variations of mixes are endless mine was just one to start with
Once you get the basic stuff right your making your own and making it better every time because you learn how the ingredients work BUT ITS ALL FUN
It sounds all very complecated but its not (not realy)