Here's a substitute.
http://www.freestylephoto.biz/10190-...Make-2-Gallons

Substitute for replenisher.

http://www.freestylephoto.biz/10191-...sher-to-Make-1

I use HC-110 also. It was Ansel's favorite. To tell you the true, I've never tried these products, but I will have to if Kodak discontinues HC-110.