I got a big Rollei Digibase kit from Macodirect.de, works great and even has instruction for working at room temperature (which also works out great!).

http://www.macodirect.de/digibase-ma...21-p-2013.html

They have smaller kits too, but apparently the unmixed chems can last for up to 2 to 3 years. I've been using my kit in batches and just mixing up a new lot every time the negs come out a little thin (around 12-15 rolls per 625ml working solution).