Do dealers even order regular or extended CAB's anymore?

I just went to ford.com and tried. Obviously I can't go back in time, but for the current Ford Super Duty model I can not configure anything higher than Lariat when it is a SuperCab/Extended Cab. Crew cab only. I don't know when this started, but I am fairly positive it is not all new.

When I was looking for a newer F350 Ext. Cab, long bed, gas, SRW with not too many miles (<120K or so) last year, I got just three hits on Autotrader nationwide. Two were white work trucks, the third I ended up buying.