Since you already have the schematic, I can get a layout and optimized BOM done in just a day or two. My PBC manufacturer takes about two weeks to get boards to me, and I'll take a day or two to test it, depending on what the shield is supposed to do.
All of the other bidders seem to be in Europe, and international shipping is expensive and slow. Since I'm in the US as well, once I'm done, I can get the prototype to you pretty quick, it should be about 3 weeks from design to your door.
I don't use EAGLE, but I can convert the files my EDA generates to EAGLE files, though that may take a day or so to figure out. I'll send you PDFs and/or Gerbers as soon as I get the design finished, so you can look over and approve them, then I'll send you EAGLE files once I get them converted.
If you have any questions, please do contact me!