I spend about twenty minutes looking at google sites without much luck. I am interested in experimenting with the tablets to see if they are as effective as other fertilizers.
I use gro-power tabs for my bonsai and everything's doing very well. Smoke does as well, I believe. You can actually contact the company directly and they'll ship to you -- they're extremely friendly!
I need to contact them as well since I'm almost out of my tabs. Check the fertilizer section of the forum and I'm sure you can find some threads on it. I think Smoke uses the organic tabs mixed with other ones. I take it you've done some research on humus and humic acid?