You can buy the pots from K|ngp|n, Der8auer or EK for example, the only problem is that it can be a bit expensive nowadays because of dollar + shipping + taxes.
And just make sure that you can buy DI/LN2 with a affordable price in your city, the prices varies greatly from region to region (eg. I pay R$23 per kg of DI in Bauru/SP, a friend of mine pays R$10 per kg in Campinas/SP).
I know people that uses ice + salt or alcohol 92.8% with ice so both of them should work fine.