There are others out there. I got mine from Robert Seib whose snakes appear in many lines, but alas Dr. Seib is not breeding indigos anymore.
wow ! (robert harper) is my chemestry teacher ! haha i did not notice you referenced him in here but i agree he has some of the most impressive indigos i have ever seen ! highly recomend him ! i believe he has some babies still avalable too !
1.7 normal bp
2.1 het pied bp
1.0 pinstripe
0.1 giant jungle carpet (Nagini)
2.4 dinkers !