Unfortunately I won't be able to get it by Saturday...
Can I sub with golden syrup then and just cook at a lower temperature?
I have never tried it but I'm sure it would taste ok. Not exact but good enough.
You can make corn syrup substitute yourself. I have never tried so I would probably go the golden syrup route.
(Personally I'd add some vanilla to this recipe. If I were to make it)
2 cups white sugar
3/4 cup water
1/4 teaspoon cream of tartar
1 pinch salt
Directions
1Combine all ingredients in a large saucepan.
2Bring to a boil, stirring constantly.
3Reduce heat to a simmer and put cover for 3 minutes to get sugar crystals off the sides of the pan.
4Uncover and simmer, stirring often, until it reaches the soft ball stage.
5Cool and store in a covered container at room temperature.