What about getting the Rollei kit in single units from Maco Direct. 5x1L bottles which can be delivered to North America and which will make 10L of developer. This is good for 200-300 rolls of film.

It probably isn't quite as economical as larger kits but you only have 5 sensible sized bottles to store and the keeping properties of this kit are great.

I'm still using my first 1.5l of working solution 8 months and 30+ rolls of film later.