I've done two lefty conversions for myself. One from a JTV-59 to a 20 year old neck-through Ibanez, and the other from a Standard to a custom lefty Standard body.
I am slowly building a shop to make guitars, and the first ones out of the gate for customers will be lefty Variax conversions. Since Yamaha won't do it... The CAD & CAM files are done. I had hoped to be up and running earlier this year, but had an issue with a new CNC machine I bought (and waited months for) that I had to return. I'm building my own machine to my own specs, and hope to be running test cuts in September.
My plan is to do my slightly more elegant Standard body, and Strat & Tele style ones to start with, and work up to the set neck models. If anyone has other ideas, I'm open to hearing them.