This is how I make Maurten 320. The ratio of Maltodextrin : Fructose is 1 : 0.8 (at least to my understanding).
Maltodextrin = 44g
Fructose = 36g
Table salt = 630mg (= 240mg Sodium)
Pectin = 500mg
Sodium alginate = 500mg
For Maurten 160 halve the carbs and leave the rest of the quantities the same.