Ha -- that's my design, with a couple of tweaks by the seller. Yay me.
Props to the seller for respecting the CC-BY licence, by mentioning me and the
Thingiverse number.
ObRelevant: I will probably add a brighter trunk light and possibly a CHMSL flasher, but so far my only accessories are things I've made: a grocery bag hook for the trunk, trays for the center compartment, three different cupholder improvements, and a tissue box holder.
The hook, the trays, and two of the three cupholder improvements are
posted on Thingiverse (and in some cases available from unaffiliated sellers.)