Try H. W. Sands Corporation in Florida. They worked with EK. Also, you might try Honeywell in Germany.
But, I can't tell you everything, now, can I? Oh, I already have! ~grin~
Actually, I have Paul Gilman here as a resource to help me with dyes, and I'm not ready for IR dyes. I'm still back working on Ortho.
Thanks for the additional information.