Again, apologies for misreading 2F/2F's post.
AgX, I agree that the only long term solution (using Kodak chemicals) will be to buy the individual chemicals and make up solutions using starters and replenishers. One problem is the cost: someone on the large format site (I can give the link if you want) estimated the cost for 10 liters as being $267.
This makes 10 L of many solutions (and much more for some others) and is much more costly, per liter, than the 5L kits. It might make it uneconomical to use unless one established a re-use policy, like the professional labs (using replenishers, etc.) This is beginning to sound complicated, but it is worth considering if one is devoted to E6 (as I am).