Hi,
I'm Bogdan, nice to meet you.
I'm working as a freelance software engineer in Europe (Bucharest at the moment) and usually I have to order custom parts for some of my projects, including infrastructure parts such as rods, concrete precast stands and connection equipment.
I can research for you a factory that delivers concrete precast walls in Europe and check that they provide the services that you need.
It would greatly help to know which countries are we talking about in EU, so that I can use that as a starting point for doing the research.
Please feel free to contact me so we can discuss further about your needs. I really feel I can help you with this.
Best regards,
Bogdan