The bed length is one the challenges of the 2010-2013 TC. To keep the bed simple for renters I kept it short enough to not interfere with the front seats and taller folks can have their feet hang off the end. I have considered a few different options to lengthen the bed once parked and the front seats are slid forward but haven't built out any yet.
Hein, I will reach out to you. Your products look like they will work well for some of my campervan projects.