Dyes for anodized aluminum

but all I can find is a large company that color anodized aluminum
in huge quantities and only sells their aluminum and dyes in huge
and 

My first thought was Reactive Metals Studio, but I just checked and
there’s nothing in their catalog.

Do you have the book Artists Anodizing Aluminum by David LaPlantz?
I’m sure he covers that.

This video might cover it:

What I remember from college is that we used fabric dye. This
website says RIT dye works well:

http://www.ganoksin.com/gnkurl/ep808r

Elaine
CreativeTextureTools.com