Never had it, but I'm going to try to clone it for you from reading reviews and posts. What fun!
I'd say the floral notes are Centennial, as they are famous for that character.
I keep hearing the beer is very peachy/fruity, which sounds like a bunch of Mosaic. From drinking a Mosaic SMaSH, Mosaic has tons of peach and blueberry. I think WDT may have gotten too old of a bottle.
Calypso is very candy-like, Watermelon/Apple Jolly Rancher, pear, etc, My guess is Calypso is the bittering charge, maybe a 15/30 minute addition. The market on them is REALLY cooling off as they are really cloying/weird.
So, let's start with a base of 2-row, and a touch of C-120.. regardless of whether they claim they use it, some reviews show up some toffee notes. Going to throw in a few ounces of Biscuit for a little breadiness/malt. We can work back on the attenuation, building a 8.5% ABV and then measuring the attenuation through the calories listed.
Listed at 70% efficiency, add/subtract base malt as needed. 5 gallon batch.
14.5 LBs 2-Row
3 oz C-120
3 oz Biscuit
8 oz Dextrose
1.0 oz Calypso @ 60 Minutes
1.0 oz Calpyso @ 20 Minutes
1.0 oz Centennial @ 10 Minutes
1.0 oz Mosaic @ 5 Minutes
1.0 oz Mosaic @ Knockout
1.0 oz Centennial @ 7 Days
1.0 oz Mosaic @ 7 Days
you need 80-82% attenuation to nail the numbers. Mash lower, ie 148-150 for 75 minutes if using US-05. Use 05, not 1056, as the S-05 carries some nice peach esters at 60-65 F. You really need to ferment at that temp.
The hop bill might need a little adjustment, but it's got the right idea. Maybe dry-hopping with .5 oz Centennial/.5 oz Calypso, but up to you.