Is there an high accutance developer that you recommend that I can make from scratch, to avoid having to pay $27 for a starter and replenisher that could replace kodak's?
Where are you located? If you're in the US, you might just try Kodak's single-use E-6 kit. It's available mail-order
Dead Link Removed among other places. It doesn't use separate starter or replenisher chemicals; it's just got instructions for single-shot use. The last time I did the math, it was actually significantly less expensive than the smaller 3-bath kits from other manufacturers, but it produces better results. It's a 6-bath kit, so it takes more effort to use, though.
If you're outside the US, the same kit may be available, but I can't provide pointers to any suppliers.