These Lamborghini Diablo sideview mirror seals where reversed engineered from OEM parts. The originals are cast in a black rubber. You can print these using TPU and they should work fine.
009490429_-_LH_Lower_Mirror_Seal.SLDPRT | 1.8MB | |
009490429_-_LH_Lower_Mirror_Seal.STL | 1.2MB |