I need an Opel workshop or user manual

Hello everyone, I'm writing from Uruguay. I'm hoping someone has a workshop or owner's manual for a 1981 Opel Rekord Caravan 2.3 Diesel (GM engine). Any manual you have, even for the sedan version, would be great. It's a bit of an old car now, but it's well-preserved and I really love it. I'm a big fan of Opels, but they're no longer sold as Opels in my country; they're now marketed as Chevrolets, making it difficult to find these kinds of things. Thanks everyone. Cheers!