So I was checking and it looks like in USA, Freestyle is the place to get your cold tone developers from. I found four of them the Moersch SE6 Cold Blue Black, Tetenal Dokumol, Clayton Ultra Cold Tone and the Arista Premium Ultra Cold Tone. Any ideas about them? I use Ilford MGIV RC and MGWT RC and MGCT RC. I also would like to experiment with Oriental Seagull VC RC. I think I'd like a blue black cool tone.
Just because a paper developer says it a "cold tone" developer doesn't necessarily mean it will produce cold tones with "X" paper. Out of the four developers you've listed the only ones that did anything for me were SE6 and Dokumol. Both are very $$$. Also, I'm using FB paper, RC responds less to paper developers IMO. I personally find Ilfords MGIV RC and MGCT RC rather cold after selenium toning, no matter what the paper developer. Good luck!