From Digital Truth website there are Kodak E-6 chemicals available in larger quantity. With $550 we can buy 8x5L (40L) E-6 chemicals by following calculations. Please let me know if this looks right.
Kodak Process E-6 Chemicals
E6 First Dev: 8313611 First Dev Repl, Process E-6, to make 10L (case of 4) $79.99 (40L)
E6 Reversal Bath: 1123611 Reversal Bath Repl, Process E-6, to make 10L (case of 12) $89.99 (120L)
E6 Color Dev: 8372542 Color Dev Repl, Process E-6, to make 5 gal (2 Cases) $79.98 (40L)
E6 Bleach: 1038660 Pre-Bleach and Repl, Process E-6AR, to make 50 gal $99.99 (200L)
E6 Fixer: 1545466 Fixer Repl, Process E-6, to make 10L (case of 6) $59.99 (60L)
E6 Final Rinse: 8140279 Final Rinse Repl, Process E-6, to make 10L (case of 12) $46.99 (120L)
Subtotal: $456.93
Shipping cost: $100.64
Total: $557.57
For $557 we have 40L for two developers. Enough to make 8x5L E-6 kits. The rest 6 chemicals are 120L, 200L, 60L, and 120L. Took out 40L from each we have 80L, 160L, 20L, and 80L left and worth $190. So 8x5L kit costs $367.
Each 5L kit costs about $46.
In this case, the discontinue of Kodak 5L E-6 Kit causes inconvenience but it is not impossible to use Kodak E-6 chemicals, unless I am wrong somewhere.