Manganese drier for oil inks - retailers?

[bridog]

Recently I learned about manganese drier that when added to oil based inks will speed up drying time. This is not to be confused with Magnesium Carbonate that is added to ink to stiffen it and reduce sheen.
Here is the problem. I would like to try some of this out (as an alternative to cobalt drier which has the whole highly toxic stigma surrounding that stuff). Although driers come with their own sets of problems such as discoloration or yellowing of inks over time, I am still curious to see how quickly ink drying time is actually sped up.
I cannot seem to locate any major online retailers here in North America who sell Manganese additive. Have looked at Blick, Graphic Chemical, McClains, Daniel Smith, etc....but no luck.
The only retailer that came up in my Goggle search was Intaglio Printmaker based in London, UK who sell 100 ml bottles.
Anyone know of places one can purchase this here in North America?

thanks in advance