oemvehicleparts.com in Florida. The order was fulfilled by JM Lexus out of Margate FL. Perhaps I misspoke regarding where they source their back-ordered inventory for the driver support module. Either way turn around seems to be 30 days right now.
You may want to document around the "OEM Vehicle Parts" link on the first post to note in the order the intent is "modification/conversion". Otherwise the dealer's policy is to ship the part called for by the VIN.
I ordered my 040 driver support module for my 2015 gx460 through OEM vehicle...