Dear Olzhas, many thanks for asking this very interesting technical question. If your goal is the synthesis of Prussian blue analogs (PBAs) with other metals than the usual iron, you can find some very useful references right here on RG. For example, please have a look at the following interesting articles:

Strategies for synthesis of Prussian blue analogues

Article Strategies for synthesis of Prussian blue analogues

and

Recent advances in Prussian blue and Prussian blue analogues: synthesis and thermal treatments

Article Recent advances in Prussian blue and Prussian blue analogues...

Both articles have been posted as public full texts on RG so that they can be freely downloaded as pdf files. As you can see, it often pays off to check the "Publications" section of RG for helpful references first.

Good luck with your work and best wishes, Frank Edelmann

P.S. Dear Olzhas, concerning the preparation of the hexacyanometallate precursors of manganese, chromium, and cobalt etc. I'm afraid that you always need to start with sodium or potassium cyanide. To the best of my knowledge there is no other way to introduce the cyanide ligands. As a typical preparation please have a look at the attached description of the synthesis of potassium hexacyanochromate, K3[Cr(CN)6]. Thus in your case the only way to prepare Prussian blue analogs is to combine your hexacyanoferrates with complex cations that have no cyanide ligands. Good luck with your research! 👍

or possible other way for real chemist that may sythesize simple salt for synthesis of hexacyanometallate from commercialy available products like (1)that you allready have or (2)some organic derivatives. :)

Sometimes it seems stuppid that many products of large industrial chemistry, such as sulfuric, nitric or hydrochloric acid (which are produced in the world in millions of tons. transported and sold, but need control ?!), can be found in the list of precursors (depending on the country) and at the same time sulfuric acid solution can be found in any car as an electrolyte in an acid battery, and this acid solution can be easily concentrated by simple physical methods that have been known to people for thousands of years! Or cyanides which widely used ifor the separation and extraction of metals, electrochemical\galvanic industrial processes, bulk organic synthesis etc?... It is really possible to control any gramms of such "precursors"?

So, Why not ban water or oxygen\air, which are also widely used in illegal process? :)