The B&H web site lists this as a special order item. That may be a significant point.
Given everything that is happening with Kodak, I am suspicious that this product may no longer be made. Frankly, I haven't seen it in a store or even advertised in years.
A problem with dry mount tissue is that since local stores have abondoned darkroom supplies (I live in a metropolitan area with a population of 500,000 - and we have only one very tiny store that carries darkroom supplies), it's become really hard to find.
The leading name in dry mount tissue is Seal. That company has been recently purchased by Bienfang who are now marketing their products under a joint Bienfang/Seal name. I've used their product in the past and have been satisfied.
But to be honest, for the last 20 years or so I've used Freestyle's Arista brand dry mount tissue exclusively. It's less expensive, and I always know where to buy it.