Thanks so much everyone for your input! This is really helpful! I am in the process of checking out each of these suggestions. They look really good so far, and right on point. My next step will be to narrow down to a few choices and hopefully demo two or three at my local clinic. Getting a back that fits my unique needs and provides correct postural support will absolutely be worth it to me, even if I have to invest out of pocket.
To answer Lin, yes, you are correct in how you read my post. I don't want laterals under any circumstances. I already have a back with laterals and they just aren't working out for me. What I am looking for is indeed lumbar support from a back without laterals. I hope that clears up any confusion! Sometimes the intent of a post can be confusing and not everyone will read it the same way, so some clarification can help.