Likely not worth the effort anyway since HC-110 is a long lasting general purpose formula.
I don't clearly understand, and it would be interesting to learn, what some of the "weird" chemicals in the HC-110 patent formula are there for. It seems to me, as a rank amateur, that one should be able to *approximate* the behavior of HC-110 by using the same levels of developing agents in an organic solvent (glycol, TEA, etc.---I seem to remember that HC-110 itself uses some form of glycol), adjusting the pH to match, and introducing a similar antifoggant (I think that's the PVP in the original formula, but there are plenty of other antifoggants that could be tried). That doesn't sound too formidable, and I wonder how much it would differ in practice from the real thing.
San Diego, CA, USA
The lady of the house has to be a pretty swell sort of person to put up with the annoyance of a photographer.
-The Little Technical Library, _Developing, Printing, And Enlarging_