A long shot, but if anybody else has one of those cheap Nintendo 3DS XL cases and happened to have the "stand" piece break... here's a replacement. You'll probably need pliers to squeeze the piece back in place, but then it functions identical to the original.
I made some cosmetic changes since my own print in the photographs, to closer match the original piece. Shouldn't cause any issues, but let me know.
Snapmaker file included if you have that printer. 23 minute print, 0.7m/2g of filament.