BB = Brewer's Best, I picked it up at my local home brew shop, you might be able to order directly through their website. It is a PG based flavor, it's rather weak but I really like it's lack of sweetness, try with either 0.5% FA or 2.5% TFA Sweet Raspberry, alternatively or use 2% INW Raspberry instead.
Regarding the Lime:
This combination worked best for me but you can try using TFA Key Lime instead. For awhile I think I liked it that way better, but after adjusting the percentages and using more INW it made more sense to go with this combination.
Regarding the Orange:
FA's Orange is rather weak, hence the addition of their strong Mandarin flavor. TFA's Orange Cream is unusually strong for TFA and works wonderfully here.
FATutti Frutti - Well I added it and it tastes good, you'd hardly notice it with it out.
Koolada at a tiny percentage doesn't really cool it much, maybe a smidge, it's hardly noticeable but it helps the fruits to stand out a little this way. Citric Acid is the same purpose, helps the fruits to stand out as individuals rather than blend together. You can source Citric Acid locally via a grocer, health food store, local brew shop. Alternatively, Nude Nicotine carries it pre-mixed in 10ml or 30ml options (I think those were it). To get a 10% solution you'll want to use 1/4 tsp per 10ml PG or 1g per 9g of PG. A lot of people recommend heating to get it to mix, I prefer just strapping the bottle to my sawsall and holding the trigger for 45 seconds. You do NOT want 'ball' Citric Acid as it typically contains some sort of preservative that's not safe to vape. A pound of CA locally will run you $4-7 and will last a lifetime.
Sweetener and Cotton Candy to add just a little more sweetness as it was slightly tart without it.