They say that in their web "Laboratorio especializado en fotografía química en blanco y negro e impresión digital sobre papeles Fine Art."
https://copialab.com/productos/
Until I know they have a fully equiped Pro darkroom to do any custom work, today I guess that most of they do (like many others) is scanning (they have a Hassie scanner with the 5x7" adapter, IIRC) and printing with big Epsons. There was less 8x10" activity in the EU, 13x18cm was a popular pro LF choice.
There are also some skilled darkroom printers in BCN that I guess I could locate, if you are interested, I guess that they would develop sheets.
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