I am sorry. That are ingredients for us, what you can buy everywhere. I think you can use your vanilla aroma, you normally use... Perhaps try circa 1 Tablespoon.
I never throw the rest of a fresh vanilla into the waste. For that I ´ve a Tupperbox with fine white sugar, and there in I put it. In a few days you have such a great Vanillasugar which is full of flavour.
Here in Germany we can buy the Vanillasugar in bundles of 5 packages. One of it contains 15 g ... about 2 full teaspoons.
I hope that I could help you.
Greetings from autumn Germany