ISO Liquid Nitrogen

Hello Cube! I need some liquid nitrogen for a cooking show. I've spoken to some welding/gas suppliers (TW Smith, Awisko, Airweld, Praxair). Some of them will sell to me, but they only have large quantity dewars to rent. 25 liters is the smallest, it's way more than we need and the deposit is $$$. Anyone know where to rent a small dewar for N2? I also left a message at -321 Ice Cream in Williamsburg but they seem to keep tricky hours this time of year... Any advice appreciated! Thanks!