I'd love to have some spares - my last spare was used to replace one that detached somewhere in the Australian countryside, never to be found again , despite scouring the roadsides. ( I glue them in now !)
But at almost $ 200 south pacific pesos for the expensive right side (??) I wont be ordering one to sit on the shelf!
I have been trying to convince my son to model some up in CAD ( or whatever) so they could be 3 D printed. Not sure it's cost feasible or whether the material available would be smooth enough, clear enough or UV stable enough to be practical. Business opportunity for someone?