I hope a company who has proper engineering and technical expertise is trolling this forum, because it is ridiculous to me that no company either JDM or US market has gone ahead and gotten this squared away for us. I would think it's any easy thing for them to address and they could easily get $500 bucks out of me and many others for this solution. You have a legion of people scared to drop their AWD, and another army of people who already have and are pissed off.
Next spring season, I am definitely going to install my BC coilovers that I've had sitting in a box untouched for three years. I've been separated from my GS for three years due to military service, but she finally showed up here in Germany. I'm sick of rolling on stock 17's at SUV height!
Come on somebody... this is a Lexus GS we're talking about here. Fix it! Shoot, I'll throw some $$$ at the R&D if I am promised a set of the solution parts.
I may try and find a German tuning shop locally if nobody steps up to the plate. Maybe a shop that specializes in Quattro Audis or AWD Porsches might be able to do something for us.