I'm gearing up to make TrampledByGeese's homemade chickpea miso. I'm spending way too much time on Google researching various methods, so I am cutting myself off.
Trampled, I may order a gallon jar, but would rather use my 1.5 liter latchlid jar that I already own. That would be a half batch. You wrote on your blog that you didn't suggest that, but your reasons weren't clear.
I can order organic brown koji rice from South River. However, I have to order $30 of products which actually comes to $40 and then another $20 for shipping. I'm so used to amazon prime free shipping that it bugs me. Another option is the koji on Amazon. It's just called koji and not koji rice. The comments mention you can make koji rice with it. Color me confused. I guess the company that sells it is vitually no help. South River has an awesome customer service dept and answer emails quickly.
Last but not least. Latchlid guy uses a couple of TBS of raw miso when he makes his. He mixes it into his koji rice with the brine.
I'm probably way over thinking this which I am prone to do.