Sorry for the delay--my suggestion is start with "scontro Perno" on Lancia Appia or Ardea, on Ebay Italy, and work backwards (contact the seller and see if they have a latch). The Grecav Eke may eventually work, but the pin is rounder. Here are a couple shots to take first;
https://www.ebay.it/itm/325746...p;LH_ItemCondition=4