Omega B – FL – Search Antenna foot

Hello together, I hope I’m right here?! I’m looking for an antenna foot, used of course. The thread or thread holder in my atennes foot seems to have loosened, broken off or something like that. Can the antenna turn in any direction is totally loose. Can’t turn it firmly and also not release it and the reception is almost as good as not available anymore. I found at 1, 2, 3…. nothing suitable or only 1-2 the completely scratch look. Just called at Opel: There are still few remaining stocks, have to be ordered. And now they are not produced any more. And now, as a part of it costs at Opel € 411,-. The ticks are not quite clean anymore. I already called at as good as every car conversion here in the perimeter. Only one said that I should call again tomorrow at 12 o’clock, get a suitable vehicle in. I could be lucky. Since I will drive to the North Sea next weekend and will sit in the car for about 3 hours, a functioning radio would be worth a lot. Has any of you a functioning, used antenna foot? Thank you for any advice, Andreas etc.