Kosher Pepsi is really hard to find other than around Passover. GetGo has a SKU in their system for it, but I don’t know if they’re going to stock it.
Boylan’s makes a soda called Cane Cola that’s fucking great, but it’s hard to find as well.
(on a side note, NO soda in canada contains HFCS. not to ride canada’s balls again or anything.)