I spent a lot of time thinking about breeding schemes and how to work them in to my "seedless" garden. Not an easy plan. Selection is key and so is being able to test your work. Considering the trouble that goes with cloning, labeling, not dusting your whole garden, etc. I thing it was DJ short (brainfart) but it was suggested to me? Take all of you best males and females (the untested ones) and label a bunch of small bottom branches accordingly. You'll only have a few test beans but you'll also be one step ahead of yourself. Plus not to mention begin a library of future ideas. Once you smoke and test all the boys and girls just go back and test the seeds you made. It don't really get you out of all the labeling bullshit but keeps you ahead of yourself.
As for females seeds, Dutch Passion was the first company I remember selling them. Soma wrote his "rodelization" article about 10-15 years ago if I remember right. I've read a lot of different ways but I would feel best about his techniques, no chems, no stress.... the way nature intended. I have not grown out any pack of Soma seeds, I had a cut out of a pack of Soma Salad that was super cherry tasting and has always made me wanna give that old hippy some loot. Damn pricey beans though!