cRiPpLe_rOoStEr -- the T4 bubble top appears optimal. The existing tumblehome is projected upward and then it's finished off with a Template-y curve.
Hersbird -- That last interior is nicely laid out. I presume the cupholders are OEM. There does seem to be one section of mattress that appears from nowhere.
I'd want my interior done in bamboo and seagrass mats
Bamboo Interiors for Vintage Volkswagen Bugs, Buses, and More
And I had posted the interior of the Suzuki Air Triser in the un-aerodynamic thread, but it fits here.
http://jalopnik.com/new-suzuki-van-concept-need-want-have-now-1734078026
Three-door, right hand drive. I like the stowaway steering wheel. And the rock-and-roll 3rd seat cushion.