Mr. Silver, I quite often have the "problem" of lacking vanilla sugar. Not a big deal. In an average sized cake or muffin recipie, just add a tsp of vanilla extract and skip the vanilla sugar. Turns out just fine usuall. And if I don't have vanilla extract (which here in britain is hugely expensive and only comes in tiny bottles) I'll use any random booze: a tsp or two of kalhua if it's a chocolatey recepie, a tsp or two of cognac otherwise, or a fruity liqueur if it's a fruity recipie.