that reminds me HPI used to make a M chassis size VW Bus body that came with an insert to cut it into a sing cab or double cab (i don't remember which)
Back in 2006 the trx forums was booming. I finally joined here 4 years ago because of how much trx slowed and tge server being down for the big move. Came here and never looked bsck.
Those vw look like a perfect fit. Far out man. Great job.