I got an answer to my own question today. For 2018 the Window Van will be shipped as an incomplete vehicle only and sent to upfitters. It cannot be ordered by a consumer.
I've been researching L- Track floors and came across the Smartfloor and the Innotrax, and it is impossible to actually buy these floors. You can only get them as part of a complete conversion with wall liners, seats, rear a/c and heat, a fire extinguisher, some no smoking decals, etc. . It's a shame really, since the floor system would be perfect for moto haulers. Like most things in the mobility industry, the prices are artificially high since many of these purchases are made through insurance companies. For those considering it, I was quoted just over $12K for a floor, walls and rear a/c and heat.
As part of that research one of the converters indicated that the 2018 model was going to be direct to upfitter only.