Depending on your budget you could perhaps have a single split La Scala cabinet built and buy the parts for it.
Post on the Update and Mod section of the forum and some one may be able to help.
There are a lot of great people who build, update, and mod Klipsch speakers and they should be able to figure something out. Perhaps someone you can pay someone to build a single split LS cabinet and then you buy the parts and finish the job.