Yes, I have found a website where this can be purchased. Please note that the price shown is in Singapore dollars, but you can change to your own currency easily in the top right-hand corner.
This is a very expensive item, so I can't see that they sell too many of them in multiples of 24 but maybe I am wrong.
There is a Sales Inquiry form for you to gain further information; they may know of a company in your locale who sell these individually. However, the product is hard to track down, so this is a good place to start.
I really hope that I have gone some way to helping you, let me know how you get on.
