I was thinking of fabricating some brackets to address the backseat. This kit is way overpriced but moves the base 1/2" forward to give a little recline. I think the base cushion could be angled upward as well to give a little more thigh support for people with longer legs. I was thinking about...
If anyone is looking for a reasonably priced, decent quality tri-fold: https://www.amazon.com/gp/product/B019NUGLGE/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
I installed yesterday and fits well. I'm probably getting a topper down the road but for now, this will work.