I've been working on a concentrated form of XTOL. You can read about it in the thread "Progress on XTOL-concentrate" in this forum. The work is not finished yet, but I've posted a couple of formulas that look as good as XTOL. Here's the latest (2nd posting on page): (there was a url link here which no longer exists)
Here's an earlier posting (also 2nd posting on page): (there was a url link here which no longer exists)
If you can buy chemicals, you can make the concentrate yourself. Or, if you don't want to make a concentrate, you can mix the formula directly into water when you need the developer. It lacks a "chelating agent", so the water-developer won't last long, so mix it soon before using.
Cheers,
Mark Overton