Hello,
There's a big variety of bud bulkers/sweeteners...mostly they're all just some form of sugar(molasses, agave, cane etc) some amino acids, carbs etc. Each brand has a slightly different mixture.
But fox farms sweet bembe is good, FloraNectar, Humboldt Secret sweet and sticky is pretty reasonably priced...
You can get some of them in fairly small containers for just this grow, until you can switch back to the B.C.