They have a small girl shop there. I'm not sure if they have it for purchase.
I saw a little fountain out there maybe is holly water.
I think you can buy it here. There is many staff members on site that can help plus the gift shop of course
I don't believe they sell any but call their Gift Shop to verify.
I did not see it for sale there.
Sorry, I have not seen Holy water for sale there
Thanks! Your answer is awaiting moderation.