I believe you’re talking about a different kind of base than what ELR can make (pure flavor base - just premixed flavorings).
What I think you are looking for, is nicknamed “stones”, like “Milkstone” etc. ELR only supports it, if you make the base with PG (most flavorings are PG-based), so you just put your base-recipe as an ingredient in a new recipe. If it’s PG-based the numbers will match. ELR does not currently support flavorings with a PG/VG-mix.