I hiaghly recommend Neventum services, I have worked with them a couple of times and they have the capacity to adapt their proposals to the needs you have for each event.
Grupo Acfa, a Service company at the company´s service. Grupo Acfa, is a Booths Design and Building agency in Spain. Grupo Acfa deals with Booths Design and Building in Spain. The company designs and mounts all kind of booths: modulate, octagonal, of design and compounds.
They work all over the Spanish provinces and know most of the Spanish fairgrounds as Madrid, Barcelona, Valencia, Bilbao, etc. They offer furniture rental for booths and events and booths cleaning services.
Grupo Acfa has a team of professional booths designers, specializing in optimizing the area of exhibition. Besides, Grupo Acfa provides sketches of high resolution in 3D of your Booths projects, where the client will be able to see with all accuracy how his booth will remain and without any cost.