The Hirschmann Antenna is still popular. The antennas are very robust and a few parts are still available. But they are rare.
Universal antenna's just cannot make the sloping corner. For that we have reproduced the original Hirschmann Dop. The original rubber edge is simulated.
Here you can still buy parts:
https://www.koenigs-klassik-radios.de/en/aerials/hirschmann-spare-telescope-auta-6000-el-and-ke_30155_1556