Available on prescription,
Hahahahaha! If I got these on prescription, I would break the (already crippled) NHS!
At the moment, I'm usually having at least one hypo every day. I'm a little bit wary of cutting out carbs altogether myself. I'm currently thinking I might reduce carbs significantly in my diet overall, and only use high-GI stuff for hypos.
Sorry, that's not much help to you,
@KittyCatMew
I remember reading that maltodextrin is used by athletes in endurance sports because although it's high-GI, it's a complex carbohydrate. It's available as powder online, and you can weigh it out into your own (sugar-free) drinks. Might be worth a try? Otherwise, as others have said, tightening up your glucose control is the next obvious step, to avoid hypos as much as possible. That's my plan, anyway.
Good luck.