Czech Uniforms in German use

http://zared-tregonwell.deviantart.com/art/Czech-Uniforms-547931842?q=gallery%3AZared-Tregonwell&qo=0
The top row of picture are uniforms claimed to be Czech in German use, the only one I'm a 100% on is the first image. Which is a Ukrainian of the Roland Battalion, who wore Czech uniforms, apparently re-dyed green. It is also claimed that the Latvian police were outfitted in Czech uniforms, but I've seen nothing so far.
It is also claimed that the Gebrigsjager used them in training and they were quite comfortable compared to the German tunic.
On the bottom row are three pictures, a Czech officer tunic, a Slovak uniform, basically Czech, and another Czech uniform.
So the big questions are, why do people think those top row tunics are Czech? Would it even be possible to get these Czech tunics dyed to some shade of feldgrau?
For me it would make more sense if they were reused by the NSKK, RAD, or Todt organisations.

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