I looked at a website for diabetics, and one of the things it suggests, is glucose tablets equivalent to 10–15 (two to three tablets). Now, that tells me that glucose will solve it, without fructose. If I were you, I'd try to make sweets using dextrose instead of sugar, or find some other way to have concentrated access to it ( in a pinch, is putting dextrose in water and drinking it not a viable solution ? )
For all that, if you're talking about a life threatening condition, I'd talk to a doctor before taking advice from strangers on the internet. Explain that you are trying a sugar free diet, and ask if glucose alone will get you through a hypo, and THEN try to come up with a dextrose heavy solution. You can also buy glucose syrup, if you wanted to make something with that, which you could eat.
