All developers are different, and yet, they are all somewhat similar as well.
One of the notable characteristics of pyrocat HD is that it's a staining and tanning developer. I.e. it hardens the gelatin selectively where development takes place, and it not only develops a metallic silver image, but also deposits an orange-colored dye where image development has taken place. The result is a warm-toned image that blocks certain wavelengths (blue and UV light) more so than others (green light). This is often exploited by people printing with alternative processes like Van Dyke Brown or Salted Paper because these processes work well with negatives with a long tonal scale. The dye stain adds to the overall density range and is therefore welcome in that case.
Is it important for your work that the developer is a staining one, like Pyrocat HD? If this is the case, can you obtain where you live either of these chemicals: pyrocatechol (CAS #120-80-9), pyrogallol (CAS #87-66-1) or hydroquinone (CAS #123-31-9)?
Or, to ask the question in a broader way: which characteristics of Pyrocat HD are you interested in? Based on that, it would be possible to suggest alternatives.
For instance, if you're appealed in Pyrocat HD by its relatively fine-grained outcomes and full emulsion speed, you might find XTOL or one of its home-made variants attractive. There's for instance home-made 'Instant Mytol', which behaves the same as official XTOL, and it's made with relatively easy to obtain ingredients: phenidone, vitamin C, sodium sulfite, borax and sodium carbonate.
