It's the same old story

[sjors]

It's the same old story and I allready know some people won't like it but...

Believe me; I read all the old posts about staining but they didn't help me much, I expiremented a lot but I still wonder:
It's a wellknown fact that getting Arsenic Trioxid or Realgar is a major problem in many countries nowadays. In my opinion there must be, chemically spoken, an alternative but simelar way to Arsenic Trioxid;
A freely available substance, a substitute that reacts in the same way with iron and nickel; a process that gives the same result like Arsenic Trioxid or Realgar does.
I'm sure i'm not the only one with this question (problem) and I appreciate and respect the proper, "old" ways but sometimes you don't have any other option than find and use "new" solutions...
What will be the alternative way?