Drink ideas/ alternatives?

So I'm planning on surprising a girl with a drink the next time I see her but there's one problem: her "go to" order is a peach green tea from Starbucks. Most likely I will be stopping at a caribou coffee and from what I can see they don't have an exact copy of it.

I see a green tea lemonade and a peach black tea as the closest options I think. I am not a tea expert, but will the black tea be that different? or should I do the green tea with the peach mango flavor shot?

She is nice so it's not life or death if it's not perfect but I also want to get it right so I'll take any help I can get!