The back cover of the American Bee Journal, December 2008, issue has some information.
Here it is : Can be fed in syrups, patties, or used in drench methods of delivery.
Available in 4 sizes
50 ml - 60 feedings $18.00
1 Liter - 1,200 feedings $240.00
Sold by Dadant.
PS: I have thought about soaking some local acorns to leach out the tannic acid. It's made from the bark of a "special oak tree"