Posting this to recommend an option for lumbar support for those looking for an "OEM" option with minimal changes to their interior. For some background info, I've had my '20LX for 4 years now and have no complaints thus far in terms of ride comfortability. That is until my first 8hr road trip that made me notice the lack of lumbar support from how sore my lower back was. Afterwards I looked thru various subreddits, forums, guides, etc. and the best option I found is the corbeau inflatable lumbar support. The inflatable bladder seems rugged, the installation is simple, and best of all, the seat now feels like it was molded to my back. Credit to this OP that gave me the idea.
I'm sure there are cheaper and better alternatives out there but this one worked for me and I want to spread the words. If you guys have better alternatives please share them to help others who love this car but suffer from the lumbar issue. Attached are pictures from the installation and obligatory picture of my ride 🙂